Fumigation (Lat. _fumigo_, to perfume a place). The use of certain fumes to counteract contagious effluvia. Function (Lat. _functio_, a doing). The special duty of any organ. Ganglion (Gr. γάγγλιν, a knot). A knot-like swelling in a nerve; a smaller nerve center. Gastric (Gr. γαστήρ, stomach). Pertaining to the stomach. Gelatine (Lat. _gelo_, to congeal). An animal substance which dissolves in hot water and forms a jelly on cooling. Germ (Lat. _germen_, a sprout, bud). Disease germ; a name applied to certain tiny bacterial organisms which have been demonstrated to be the cause of disease. Germicide (_Germ_, and Lat. _caedere_, to kill). Any agent which has a destructive action upon living germs, especially _bacteria_. Gland (Lat. _glans_, an acorn). An organ consisting of follicles and ducts, with numerous blood-vessels interwoven. Glottis (Gr. γλόττα, the tongue). The narrow opening between the vocal cords. Glucose. A kind of sugar found in fruits, also known as grape sugar. Gluten. The glutinous albuminoid ingredient of cereals. Glycogen. Literally, “producing glucose.” Animal starch found in liver, which may be changed into glucose. Gram. Unit of metric system, 15.43 grains troy. Groin. The lower part of the abdomen, just above each thigh. Gustatory (Lat. _gusto_, _gustatum_, to taste). Belonging to the sense of _taste_. Gymnastics (Gr. γυμνάξω, to exercise). The practice of athletic exercises. Hæmoglobin (Gr. αἷμα, blood, and Lat. _globus_, a globe or globule). A complex substance which forms the principal coloring constituent of the red corpuscles of the blood. Hemispheres (Gr. ἡμί, half, and σφαῖρα, a sphere). Half a sphere, the lateral halves of the cerebrum, or brain proper. Hemorrhage (Gr. αἷμα, blood, and ῥήγνυμι, to burst). Bleeding, or the loss of blood. Hepatic (Gr. ἧπαρ, the liver). Pertaining to the liver. Herbivorous (Lat. _herba_, an herb, and _voro_, to devour). Applied to animals that subsist upon vegetable food. Heredity. The predisposition or tendency derived from one’s ancestors to definite physiological actions. Hiccough. A convulsive motion of some of the muscles used in breathing, accompanied by a shutting of the glottis. Hilum, sometimes written Hilus. A small fissure, notch, or depression. A term applied to the concave part of the kidney. Homogeneous (Gr. ὁμός, the same, and γένος, kind). Of the _same kind_ or quality throughout; uniform in nature,—the reverse of heterogeneous. Humor. The transparent contents of the eyeball. Hyaline (Gr. ὕαλος, glass). Glass-like, resembling glass in transparency. Hydrogen. An elementary gaseous substance, which, in combination with oxygen, produces water. Hydrophobia (Gr. ὕδωρ, water, and φοβέομαι, to fear). A disease caused by the bite of a rabid dog or other animal. Hygiene (Gr. ὑγἰεια health). The art of preserving health and preventing disease.