This definition of exhalants is from the theory of Haller and others. It is now believed that the fluids exude through the thin coats of the blood vessels. This process is called exosmose, and is the exhalation of old physiologists.

It is a well-established fact, in animal and vegetable physiology, that membranes possess the property of allowing fluids and gases to pass through them in either direction, and also to permit two fluids to pass in opposite directions at the same time. This property is designated endosmose when a fluid passes from without a body inward; and exosmose when the reverse takes place. The first is called imbibition. One of the most striking instances of this, in the human system, is shown in the lungs, where carbonic acid and water pass out through the mucous membrane of the bronchial tubes and air-cells; and the oxygen of the air enters the blood through the same membrane. By this process of imbibition, the oxygenation of the blood is much more readily and faithfully accomplished; inasmuch, as by the immense number of bronchial tubes and air-cells a larger quantity of blood is exposed to a greater portion of air, than if the blood were directly laid open to the atmosphere in a mass, or the air were immediately transmitted through it.

Since the function of respiration is to free the system of superfluous carbon and hydrogen, by union with the oxygen of the air, it follows that the greater the amount of the products to be expelled, the larger the quantity of oxygen will be required to effect this purpose, as we find to be the case with those who consume large quantities of food.

The quantity of oxygen daily consumed through the lungs by an adult is about 32.5 oz., and the carbon in the food 13.9 oz. But in order to convert this whole amount of carbon into carbonic acid, which passes off through the lungs and skin, 37 oz. of oxygen are required; the remaining 4.5 oz. being absorbed by the skin. If the supply of food remain the same, while the amount of oxygen in the inspired air is diminished, the superfluous carbon will induce disease in the system, as is the case of those persons who are limited in their supply of air of a proper quality or quantity, and, consequently, have less appetite for food than those who are abundantly supplied with air of the proper standard of health; and in children, who proportionally consume more food than adults, and who are more active, thereby causing a more rapid circulation of blood, and, consequently, the removal of more superfluous particles of matter.

The theory of Baron Liebig concerning the change which the blood experiences in color, in its passage through the lungs, meets with the approbation of many physiologists, although there are some important difficulties in the way of fully receiving it. A chemical analysis of the blood shows it to be composed of albumen and fibrin, together with some other substances, in small proportions, and always perceptible traces of iron. He attributes the change in color to the iron, as this substance enters into combination with carbon and oxygen. For, as the blood passes through the trunks of the larger vessels and capillaries, it receives the carbon from the tissues which are continually transformed, and taking up the oxygen from the arterialized blood, forms carbonic acid, which unites with the iron, forming proto-carbonate of iron. This being of a gray color, he supposes it to be that which, with the other impurities of the blood, gives the venous blood the dark blue color. Then, as the blood comes in contact with the oxygen, as it is returned and exposed to this element in the lungs, the carbonic acid leaves the iron, which has a stronger affinity for oxygen than for carbonic acid, and forms the scarlet red peroxide of iron, that gives the characteristic color to the arterial blood. After this, as the blood is sent out through the smaller arteries and capillaries, it again gathers carbon and other impurities from the system, and becomes the dark, venous blood, thus completing the whole change of color in the circulation.

As already mentioned, different articles of food have been divided into the azotized and non-azotized, or those which contain nitrogen as one of their constituents, and those which are nearly destitute of it. Of these, according to Liebig, the azotized portions are simply to supply the waste that is continually going on in the body, and promote its growth in the early stages of existence, or, in other words, the nutrient portion; while the sugar, starch, &c., are mainly of use in the respiratory organs. The correctness of this view may be understood from the fact, that the inhabitants in the colder regions of the earth consume a much larger quantity of oil and fat than the residents of hotter climates; and also those dwelling in the temperate zones can eat with greater impunity a larger quantity of fat meats in the winter than in the summer, there being then so much more demand for animal heat than in the summer.

The suggestion of using the bellows in asphyxia, is from the directions of that distinguished and veteran surgeon, Valentine Mott, of New York city. The directions in the first part of the paragraph are the most practical, and best adapted to the wants of the community.

Ab-do´men. [L. abdo, to hide.] That part of the body which lies between the thorax and the bottom of the pelvis.

Ab-dom´in-is. Pertaining to the abdomen.

A-ce-tab´u-lum. [L. acetum, vinegar.] The socket for the head of the thigh-bone; an ancient vessel for holding vinegar.

A-ce´tic. [L. acetum, vinegar.] Relating to acetic acid. This is always composed of oxygen, hydrogen, and carbon, in the same proportion.

A-chil´lis. A term applied to the tendon of two large muscles of the leg.

A-cro´mi-on. [Gr. ακρος, akros, highest, and ωμος, omos, shoulder.] A process of the scapula that joins to the clavicle.

Ad-duc´tor. [L. adduco, to lead to.] A muscle which draws one part of the body toward another.

Al-bu-gin´e-a. [L. albus, white.] A term applied to white textures.

Al-bu´men. [L. albus, white.] An animal substance of the same nature as the white of an egg.

A-lu´min-um. [L.] The name given to the metallic base of alumina.

Al´ve-o-lar. [L. alveolus, a socket] Pertaining to the sockets of the teeth.

Am-mo´ni-a. An alkali. It is composed of three equivalents of hydrogen and one of nitrogen.

A-nas´to-mose. [Gr. ανα, ana, through, and στομα, stoma, mouth.] The communication of arteries and veins with each other.

An-a-tom´i-cal. Relating to the parts of the body, when dissected or separated.

A-nat´o-my. [Greek ανα, ana, through, and τομη, tomē a cutting.] The description of the structure of animals. The word anatomy properly signifies dissection.

An´gu-li. [L. angulus, a corner.] A term applied to certain muscles on account of their form.

An-i-mal´cu-læ. [L. animalcula, a little animal.] Animals that are only perceptible by means of a microscope.

An´nu-lar. [L. annulus, a ring.] Having the form of a ring.

An-ti´cus. [L.] A term applied to certain muscles.

A-ort´a. [Gr. αορτη, aortē; from αηρ, aēr, air, and τηρεω, tēreo, to keep.] The great artery that arises from the left ventricle of the heart.

Ap-o-neu-ro´sis. [Gr. απο, apo, from, and νευρον, neuron, a nerve.] The membranous expansions of muscles and tendons. The ancients called every white tendon neuron, a nerve.

Ap-pa-ra´tus. [L. apparo, to prepare.] An assemblage of organs designed to produce certain results.

Ap-pend´ix. [L., an addition.] Something appended or added.

A´que-ous. [L. aqua, water.] Partaking of the nature of water.

Ar´te-ry. [Gr. αηρ, aēr, air, and τηρεω, tēreo, to keep; because the ancients thought that the arteries contained only air.] A tube through which blood flows from the heart.

A-ryt-e´noid. [Gr. αρυταινα, arutaina, a ewer, and ειδος, eîdos, form.] The name of a cartilage of the larynx.

As-cend´ens. [L.] Ascending; rising.

As-phyx´i-a. [Gr. α, a, not, and σφυξις, sphyxis, pulse.] Originally, want of pulse; now used for suspended respiration, or apparent death.

As-trag´a-lus. [Gr.] The name of a bone of the foot. One of the tarsal bones.

Aud-i´tion. [L. audio, to hear.] Hearing.

Aud-it-o´ri-us. [L.] Pertaining to the organ of hearing.

Au´ri-cle. [L. auricula, the external ear; from auris, the ear.] A cavity of the heart.

Au-ric´u-lar. [L. auricula.] Pertaining to the auricle.

Ax-il´la. [L.] The armpit.

Ax´il-la-ry. Belonging or relating to the armpit.

A-zote´. [Gr. α, a, not, and ζωη, zoē, life.] Nitrogen. One of the constituent elements of the atmosphere. So named because it will not sustain life.

Ben-zo´ic. Benzoic acid. A peculiar vegetable acid, obtained from benzoin and some other balsams.

Bi´ceps. [L. bis, twice, and caput, a head.] A name applied to muscles with two heads at one extremity.

Bi-cus´pids. [L. bis and cuspis, a point.] Teeth that have two points upon their crown.

Bile. [L. bilis.] A yellow, viscid fluid secreted by the liver.

Bi-pen´ni-form. [L. bis and penna, a feather.] Bipenniform muscle. Having fibres on each side of a common tendon.

Brach´i-al. [L. brachium.] Belonging to the arm.

Bronch´i-a, -æ. [L.] A division of the trachea that passes to the lungs.

Bronch´i-al. Relating to the bronchia.

Bronch-i´tis. [L.] An inflammation of the bronchia.

Buc-ci-na´tor. [L. buccinum, a trumpet.] The name of a muscle of the cheek, so named because used in blowing wind instruments.

Bur´sæ Mu-co´sa. [L. bursa, a purse, and mucosa, viscous.] Small sacs, containing a viscid fluid, situated about the joints, under tendons.

Cæ´cum. [L.] Blind; the name given to the commencement of the colon.

Calx, Cal´cis. [L.] The heel-bone.

Cal´ci-um. [L.] The metallic basis of lime.

Cap´su-lar. Pertaining to a capsule.

Cap´sule. [L. capsula, a little chest.] A membranous bag, enclosing a part.

Ca´put. [L.] The head. Caput coli. The head of the colon.

Car´bon. [L. carbo, a coal.] Pure charcoal. An elementary combustible substance.

Car-bon´ic. Pertaining to carbon.

Car´di-ac. [Gr. καρδια, kardia, heart.] Relating to the heart, or upper orifice of the stomach.

Car´ne-a, -æ. [L. caro, carnis, flesh.] Fleshy.

Ca-rot´id. [Gr. καρος, karos, lethargy.] The great arteries of the neck that convey blood to the heart. The ancients supposed drowsiness to be seated in these arteries.

Car´pal. [L. carpus, the wrist.] Relating to the wrist.

Car´pus, -i. [L.] The wrist.

Car´ti-lage. [L. cartilago.] Gristle. A smooth, elastic substance, softer than bone.

Car-ti-lag´in-ous. Pertaining to cartilage.

Cau-ca´sian. One of the races of men.

Ca´va. [L.] Hollow. Vena cava. A name given to the two great veins of the body.

Cel´lu-lar. [L. cellula, a little cell.] Composed of cells.

Cer-e-bel´lum. [L.] The hinder and lower part of the brain, or the little brain.

Cer´e-bral. Pertaining to the brain.

Cer´e-brum. [L.] The front and large part of the brain. The term is sometimes applied to the whole contents of the cranium.

Cer´e-bro-Spi´nal. Relating to the brain and spine.

Cer´vix. [L.] The neck.

Cer´vi-cal. Relating to the neck.

Chest. [Sax.] The thorax; the trunk of the body from the neck to the abdomen.

Chlo´rine. [Gr. χλορος, chloros, green.] Chlorine gas, so named from its color.

Chor´da, -æ. [L.] A cord. An assemblage of fibres.

Cho´roid. [Gr. χοριον, chorion.] A term applied to several parts of the body that resemble the skin.

Chyle. [Gr. χυλος, chulos, juice.] A nutritive fluid, of a whitish appearance, which is extracted from food by the action of the digestive organs.

Chyl-i-fi-ca´tion. [chyle and L. facio, to make.] The process by which chyle is formed.

Chyme. [Gr. χυμος, chumos, juice.] A kind of grayish pulp formed from the food in the stomach.

Chym-i-fi-ca´tion. [chyme and L. facio, to make.] The process by which chyme is formed.

Cil´ia-ry. [L. cilia, eyelashes.] Belonging to the eyelids.

Cin-e-ri´tious. [L. cinis, ashes.] Having the color of ashes.

Clav´i-cle. [L. clavicula, from clavis, a key.] The collar-bone; so called from its resemblance in shape to an ancient key.

Clei´do. A term applied to some muscles that are attached to the clavicle.

Co-ag´u-lum. [L.] A coagulated mass, a clot of blood.

Coc´cyx. [Gr.] An assemblage of bones joined to the sacrum.

Coch´le-a. [Gr. κοχλω, kochlo, to twist; or L. cochlea, a screw.] A cavity of the ear resembling in form a snail shell.

Co´lon. [Gr.] A portion of the large intestine.

Co-lum´na, -æ.[L.] A column or pillar.

Com-mu´nis. [L.] A name applied to certain muscles.

Com-plex´us. [L. complector, to embrace.] The name of a muscle that embraces many attachments.

Com-press´or. [L. con, together, and premo, pressus, to press.] A term applied to some muscles, that compress the parts to which they are attached.

Con´dyle. [Gr. κονδυλος, kondulos, a knuckle, a protuberance.] A prominence on the end of a bone.

Con-junc-ti´va. [L. con, together, and jungo, to join.] The membrane that covers the anterior part of the globe of the eye.

Cop´per. A metal of a pale, red color, tinged with yellow.

Cor-a´coid. [Gr. κοραξ, korax, a crow, and ειδος, eîdos, form.] A process of the scapula shaped like the beak of a crow.

Co´ri-on. [Gr. χοριον, chorion, skin.] The true skin.

Corn´e-a. [L. cornu, a horn.] The transparent membrane in the fore part of the eye.

Cos´ta. [L. costa, a coast, side, or rib.] A rib.

Cri´coid. [Gr. κρικος, krikos, a ring, and ειδος, eîdos, form.] A name given to a cartilage of the larynx, from its form.

Crys´tal-line. [L. crystallinus, consisting of crystal.] Crystalline lens. One of the humors of the eye. It is convex, white, firm, and transparent.

Cu´bi-tus, -i. [L. cubitus, the elbow.] One of the bones of the forearm, also called the ulna.

Cu´boid. [Gr. κυβος, kubos, a cube, and ειδος, eîdos, form.] Having nearly the form of a cube.

Cu-ne´i-form. [L. cuneus, a wedge.] The name of bones in the wrist and foot.

Cus´pid. [L. cuspis, a point.] Having one point.

Cu-ta´ne-ous. [L. cutis, skin.] Belonging to the skin.

Cu´ti-cle. [L. cutis.] The external layer of the skin.

Cu´tis Ve´ra. [L. cutis, and vera, true.] The internal layer of the skin; the true skin.

Del´toid. [Gr. δελτα, delta, the Greek letter Δ, and ειδος, eîdos, form.] The name of a muscle, that resembles in form the Greek letter Δ.

Dens. [L.] A tooth.

Dent´al. [L. dens, tooth.] Pertaining to the teeth.

De-press´or. [L.] The name of a muscle that draws down the part to which it is attached.

Derm´oid. [Gr. δερμα, derma, the skin, and ειδος, eîdos, form.] Resembling skin.

De-scend´ens. [L. de and scando, to climb.] Descending, falling.

Di´a-phragm. [Gr. διαφραμα, diaphragma, a partition.] The midriff; a muscle separating the chest from the abdomen.

Di-ar-rhœ´a. [Gr. διαρρεω, diarrheo, to flow through.] A morbidly frequent evacuation of the intestines.

Di-as´to-le. [Gr. διαστελλω, diastello, to put asunder.] The dilatation of the heart and arteries when the blood enters them.

Di-ges´tion. [L. digestio.] The process of dissolving food in the stomach, and preparing it for circulation and nourishment.

Dig-i-to´rum. [L. digitus, a finger.] A term applied to certain muscles of the extremities.

Dor´sal. [L. dorsum, the back.] Pertaining to the back.

Du-o-de´num. [L. duodenus, of twelve fingers’ breadth.] The first portion of the small intestine.

Du´ra Ma´ter. [L. durus, hard, and mater, mother.] The outermost membrane of the brain.

Dys´en-ter-y. [Gr. δυς, dūs, bad, and εντερια, enteria, intestines.] A discharge of blood and mucus from the intestines attended with tenesmus.

Dys-pep´si-a. [Gr. δυς, dūs, bad, and πεπτω, pepto, to digest.] Indigestion, or difficulty of digestion.

En-am´el. [Fr.] The smooth, hard substance which covers the crown or visible part of a tooth.

Ep-i-derm´is. [Gr. επι, epi, upon, and δερμα, derma, the skin.] The scarf-skin; the cuticle.

Ep-i-glot´tis. [Gr. επι, epi, upon, and γλωττα, glōtta, the tongue.] One of the cartilages of the glottis.

Eu-sta´chi-an Tube. A channel from the fauces to the middle ear, named from Eustachius, who first described it.

Ex´cre-ment. [L. excerno, to separate.] Matter excreted and ejected; alvine discharges.

Ex-cre-men-ti´tial. Pertaining to excrement.

Ex´cre-to-ry. A little duct or vessel, destined to receive secreted fluids, and to excrete or discharge them; also, a secretory vessel.

Ex-tens´or. [L.] A name applied to a muscle that serves to extend any part of the body; opposed to Flexor.

Fa´cial. [L. facies, face.] Pertaining to the face.

Falx. [L. falx, a scythe.] A process of the dura mater shaped like a scythe.

Fas´ci-a. [L. fascia, a band.] A tendinous expansion or aponeurosis.

Fas-cic´u-lus, -li. [L. fascis, a bundle.] A little bundle.

Faux, -ces. [L.] The top of the throat.

Fem´o-ral. Pertaining to the femur.

Fem´o-ris. A term applied to muscles that are attached to the femur.

Fe´mur. [L.] The thigh-bone.

Fe-nes´tra, -um. [L. fenestra, a window.] A term applied to some openings into the internal ear.

Fi´bre. [L. fibra.] An organic filament, or thread, which enters into the composition of every animal and vegetable texture.

Fi´brin. A peculiar organic substance found in animals and vegetables; it is a solid substance, tough, elastic, and composed of thready fibres.

Fi´brous. Composed or consisting of fibres.

Fi´bro-Car´ti-lage. An organic tissue, partaking of the nature of fibrous tissue and that of cartilage.

Fib´u-la. [L., a clasp.] The outer and lesser bone of the leg.

Fib´u-lar. Belonging to the fibula.

Fil´a-ment. [L. filamenta, threads.] A fine thread, of which flesh, nerves, skin, &c., are composed.

Flec´tion. [L. flectio.] The act of bending.

Fol´li-cle. [L. folliculus, a small bag.] A gland; a little bag in animal bodies.

Fore´arm. The part of the upper extremity between the elbow and hand.

Fos´sa. [L., a ditch.] A cavity in a bone, with a large aperture.

Fræ´num. [L., a bridle.] Frænum linguæ. The bridle of the tongue.

Func´tion. [L. fungor, to perform.] The action of an organ or system of organs.

Fun´gi-form. [L. fungus and forma.] Having terminations like the head of a fungus, or a mushroom.

Gan´gli-on, -a. [Gr.] An enlargement in the course of a nerve.

Gas´tric. [Gr. γαστηρ, gastēr, the stomach.] Belonging to the stomach.

Gas-troc-ne´mi-us. [Gr. γαστηρ, gastēr, the stomach, and κνημη, knēmē, the leg.] The name of large muscles of the leg.

Gel´a-tin. [L. gelo, to congeal.] A concrete animal substance, transparent and soluble in water.

Gle´noid. [Gr. γληνη, glēnē, a cavity.] A term applied to some articulate cavities of bones.

Glos´sa. [Gr.] The tongue. Names compounded with this word are applied to muscles of the tongue.

Glos´so-Pha-ryn´gi-al. Relating to the tongue and pharynx.

Glot´tis. [Gr.] The narrow opening at the upper part of the larynx.

Glu´te-us. [Gr.] A name given to muscles of the hip.

Hem´or-rhage. [Gr. ἁιμα, haima, blood and ρηγνυω, rēgnuo, to burst.] A discharge of blood from an artery or vein.

Hu´mer-us. [L.] The bone of the arm.

Hy´a-loid. [Gr.] A transparent membrane of the eye.

Hy´dro-gen. [Gr. ὑδωρ, water, and γενναω, to generate.] A gas which constitutes one of the elements of water.

Hy´gi-ene. [Gr. ὑγιεινον, hugieînon, health.] The part of medicine which treats of the preservation of health.

Hy´oid. [Gr. υ and ειδος, eîdos, shape.] A bone of the tongue resembling the Greek letter upsilon in shape.

Hy-oid´e-us. Pertaining to the hyoid bone.

Hy´po-glos´sal. Under the tongue. The name of a nerve of the tongue.

Il´e-um. [Gr. ειλω, eilō, to wind.] A portion of the small intestines.

Il´i-ac. [From the above.] The flank; pertaining to the small intestine.

Il´i-um. The haunch-bone.

In-ci´sor. [L. incido, to cut.] A front tooth that cuts or divides.

In´dex. [L. indico, to show.] The fore-finger; the pointing finger.

In-nom-i-na´ta. [L. in, not, and nomen, name.] Parts which have no proper name.

In-os´cu-late. [L. in and osculatus, from osculor, to kiss.] To unite, as two vessels at their extremities.

In´ter. [L.] Between.

In-ter-cost´al. [L. inter, between, and costa, a rib.] Between the ribs.

In-ter-no´di-i. [L. inter, between, and nodus, knot.] A term applied to some muscles of the forearm.

In-ter-sti´tial. [L. inter, between, and sto, to stand.] Pertaining to or containing interstices.

In-tes´tines. [L. intus, within.] The canal that extends from the stomach to the anus.

I´ris. [L., the rainbow.] The colored circle that surrounds the pupil of the eye.

I´vo-ry. A hard, solid, fine-grained substance of a fine white color; the tusk of an elephant.

Je-ju´num. [L., empty.] A portion of the small intestine.

Ju´gu-lar. [L. jugulum, the neck.] Relating to the throat. The great veins of the neck.

La´bi-um, La´bi-i. [L.] The lips.

Lab´y-rinth. [Gr.] The internal ear, so named from its many windings.

Lach´ry-mal. [L. lachryma, a tear.] Pertaining to tears.

Lac´te-al. [L., lac, milk.] A small vessel or tube of animal bodies for conveying chyle from the intestine to the thoracic duct.

Lam´i-na, -æ. [L.] A plate, or thin coat lying over another.

Lar´ynx. [Gr. λαρυγξ, larunx.] The upper part of the windpipe.

Lar-yn-gi´tis. Inflammation of the larynx.

La-tis´si-mus, -mi. [L., superlative of latus, broad.] A term applied to some muscles.

Le-va´tor. [L. levo, to raise.] A name applied to a muscle that raises some part.

Lig´a-ment. [L. ligo, to bind.] A strong, compact substance serving to bind one bone to another.

Lin´e-a, -æ. [L.] A line.

Lin´gua, -æ. [L.] A tongue.

Liv´er. The name of one of the abdominal organs, the largest gland in the system. It is situated below the diaphragm, and secretes the bile.

Lobe. A round projecting part of an organ.

Lon´gus, Lon´gi-or. [L., long, longer.] A term applied to several muscles.

Lum´bar. [L. lumbus, the loins.] Pertaining to the loins.

Lymph. [L. lympha, water.] A colorless fluid in animal bodies, and contained in vessels called lymphatics.

Lym-phat´ic. A vessel of animal bodies that contains or conveys lymph.

Mag-ne´si-um. The metallic base of magnesia.

Mag´nus, -na, -num. [L., great.] A term applied to certain muscles.

Ma´jor. [L., greater.] Greater in extent or quantity.

Man´ga-nese. A metal of a whitish gray color.

Mar´row. [Sax.] A soft, oleaginous substance, contained in the cavities of bones.

Mas-se´ter. [Gr. μασσαομαι, massaomai, to chew.] The name of a muscle of the face.

Mas´ti-cate, Mas-ti-ca´tion. [L. mastico.] To chew; the act of chewing.

Mas´toid. [Gr. μαστος, mastos, breast, and ειδος, eîdos, form.] the name of a process of the temporal bone behind the ear.

Mas-toid´e-us. A name applied to muscles that are attached to the mastoid process.

Max-il´la. [L.] The jaw-bone.

Max´il-la-ry. Pertaining to the jaw.

Max´i-mus, -um. [L., superlative of magnus, great.] A term applied to several muscles.

Me-a´tus. [L. meo, to go.] A passage or channel.

Me-di-as-ti´num. A membrane that separates the chest into two parts.

Me´di-um, -a. [L.] The space or substance through which a body passes to any point.

Med´ul-la-ry. [L., medulla, marrow.] Pertaining to marrow.

Me-dul´la Ob-lon-ga´ta. Commencement of the spinal cord.

Me-dul´la Spi-na´lis. The spinal cord.

Mem´bra-na. A membrane; a thin, white, flexible skin formed by fibres interwoven like net-work.

Mem´bra-nous. Relating to membrane.

Mes´en-ter-y. [Gr. μεσος, mesos, the middle, and εντερον, enteron, the intestine.] The membrane in the middle of the intestines, by which they are attached to the spine.

Mes-en-ter´ic. Pertaining to the mesentery.

Met-a-car´pal. Relating to the metacarpus.

Met-a-car´pus. [Gr. μετα, meta, after, and καρπος, karpos, wrist.] The part of the hand between the wrist and fingers.

Met-a-tar´sal. Relating to the metatarsus.

Met-a-tar´sus. [Gr. μετα, meta, after, and ταρσος, tarsos, the tarsus.] The instep. A term applied to seven bones of the foot.

Mid´riff. [Sax. mid, and hrife, the belly.] See Diaphragm.

Min´i-mus, -i. [L.] The smallest. A term applied to several muscles.

Mi´nor. [L.] Less, smaller. A term applied to several muscles.

Mo-di´o-lus. [L. modus, a measure.] A cone in the cochlea around which the membranes wind.

Mo´lar. [L. mola, a mill.] The name of some of the large teeth.

Mol´lis. [L.] Soft.

Mo´tor, -es. [L. moveo, to move.] A mover. A term applied to certain nerves.

Mu´cous. Pertaining to mucus.

Mu´cus. A viscid fluid secreted by the mucous membrane, which it serves to moisten and defend.

Mus´cle. A bundle of fibres enclosed in a sheath.

Mus´cu-lar. Relating to a muscle.

My-o´des. A term applied to certain muscles of the neck.

Na´sal. Relating to the nose.

Na´sus. [L., the nose.] The nostrils.

Nerve. An organ of sensation and motion in animals.

Nerv´ous. Relating to the nerves.

Neu-ri-lem´a. [Gr. νευρον, neuron, a nerve, and λεμμα, lema, a sheath.] The sheath or covering of a nerve.

Ni´grum. [L.] Black.

Ni´tro-gen. That element of the air which is called azote.

Nu-tri´tion. The art or process of promoting the growth, or repairing the waste of the system.

Oc-cip-i-ta´lis. Pertaining to the back part of the head.

Oc´ci-put. [L. ob and caput, the head.] The hinder part of the head.

Oc-u-lo´rum. Of the eyes.