Intralobular (Lat. intra, within; lobulus, a lobule), applied to vessels passing into the lobules of the liver.

Intrinsic (Lat. intrinseeus, on the inside), inherent, inward.

Intussusception (Lat. intus, within; suscipere, to receive), invagination or doubling inward of one part of the intestine within another part.

Iris (Or. iris, a coloured halo or circle), the anterior portion of the vascular tissue of the eye, surrounding the pupil.

Ischium (Gr. ischion, hip), the bone forming the posterior part of the os innominatum.

Isthmus (Gr. isthmos, isthmus), the neck or constricted part of an organ.

J

Jugular (Lat. jugulum, throat), pertaining to the throat, especially to two large veins of the throat.

K

Keratoma (Gr. keras, horn), a horn tumour; applied more especially to a growth from the hoof of the horse.

Kilogram (Fr. kilogramme, Gr. chilioi, one thousand, and gramma, a grain), a French standard weight, one thousand grams or 2.2 pounds avoirdupois.

L

Labial (Lat. labium, a lip), pertaining to the lips.

Lachrymal (Lat. laeryma, a tear), having reference to the organs secreting tears.

Lacteals (Lat. lac, milk), the lymphatics or vessels of the small intestine that take up the chyle.

Lamella (Lat. dim. of lamina, a plate), a term applied to a thin scale or plate of tissue, as the lamella of the foot of the horse.

Laminitis (Gr. lamina, plate; itis, inflammation), inflammation of the laminae of the horse's foot.

Lampas (Fr. lampas, lampas), a fleshy swelling behind the upper incisor teeth in the horse.

Larval (Lat. larva, a ghost), pertaining to the condition of a larva, the larva being the early form of an animal quite different from the full-grown form.

Lecithin (Gr. lekithos, yolk of egg), a nitrogenous substance occurring widely throughout the body.

Leguminous (Lat. legumen, pulse), pertaining to the Leguminosae or pea-flowered family of plants.

Leptothrix (Gr. leptos, thin, and thrix, hair), a genus of bacteria whose elements form straight filaments often of great length.

Leucin (Gr. leukos, white), a crystalline substance occurring in the pancreas, spleen, thymus gland, and other parts of the body.

Lichen (Gr. leichen, a lichen), a skin disease in which there is an eruption of solid papules.

Lingual (Lat. lingua, tongue), pertaining to or shaped like the tongue.

Lithontriptic (Gr. lithos, stone, thryptein, to crush), applied to an instrument for crushing stone in the bladder.

Lithotomy (Gr. lithos, stone, temncin, to cut), cutting into the neck of the bladder to remove a calculus or stone.

Lithotrity (Gr. lithos, stone; Lat. terere, to rub), the operation of crushing a stone in the bladder by means of a lithotrite or crushing instrument, and removing it piecemeal.

Lobule (Lat. lobulus, a lobe), a small lobe or division of an organ.

Lumbricalis (Lat. lumbricus, a worm), a name of certain small muscles in the hands and feet.

Lunare (Lat. luna, moon), a bone of the carpus.

Lupus (Lat., a wolf), a chronic disease of the skin characterized by the development of nodules of granulation tissue.

Lymph (Lat. lympha, clear water), a colourless fluid allied to blood, and contained in vessels called lymphatics.

Lymphangitis (Lat. lympha, lymph; Gr. angeion, vessel, itis, inflammation), inflammation of a lymphatic vessel.

Lymphatic temperament, a condition of system characterized by flabby muscles, sluggish character, and a predisposition to diseases of a low type.

M

Macule (Lat. macula, a spot), discoloration of the skin due to hyperaemia or extravasation of blood, or to pigmentation of the skin.

Malar (Lat. mala, cheek), pertaining to the cheek or cheek-bone.

Malarial (It. mala aria, bad air), pertaining to malaria, a feverish disease common in many marshy districts.

Malic acid (Lat. malum, an apple), an acid formed in many plants and their fruit - apples, grapes, etc.

Mallein (Lat. malleus, farcy), a fluid obtained from the bacillus mallei - the micro-organism of glanders.

Malleolus (Lat. dim. of malleus, hammer), a process-of bone having a hammer-like shape.

Marasmus (Gr. marasmos, maraincin, to grow lean), a gradual, general deterioration in strength, with marked emaciation.

Massage (Fr., from Gr. masscin, to knead), rubbing, kneading, and other manipulations of the superficial parts of the body.

Mastoid (Gr. mastos, breast; eidos, shape), having the shape of the breast or of a nipple, applied to a part of the temporal bone.

Meatus (Lat. meare, to flow or pass), a passage, duct, or canal.

Meconium (Gr. mekonion, lit. poppy juice), the first faecal discharges of the new born.

Mediastinum (Lat. medio stare, to stand in the middle), a middle portion or septum separating adjacent parts.

Medulla (Lat. medulla, marrow), a structure enclosed in another structure, like the marrow of bone.

Medullated (Lat. medulla, marrow), forming a medulla, as nerve fibres enclosed in a medullary sheath.

Megacoccus (Gr. megai, large, and kokkos, a berry), a large-sized rounded bacterium or coccus: opposed to a micrococcus.

Megastoma (Gr. megas, large; stoma, a mouth), a. genus of infusorians.

Megrims (Fr. migraine; Lat. hemicrania), neuralgia of one half of the head.

Melanosis (Gr. mclas, melan, black), a general tendency to the deposit of black pigment in various parts of the body, mostly seen in grey horses.

Membrana nictitans. See Nictitating membrane.

Meningitis (Gr. meninx, membrane, and itis, inflammation), inflammation of the membranes of the-brain or spinal cord.

Merismopedia (Gr. merismos, division; pais, child), a bacterium multiplying by rectangular division, thus-forming a group of four cells in one plane.

Mesentery (Gr. mesos, middle, and enteron, bowel), a fold of peritoneum connecting the small intestine-to the spine and keeping it in place.