GLOSSARY 375 



Hy-dro-phoTn-a (Gr. JSwp, hitdor, water, and <t>optw,phobeo, to fear). ,A 

 disease caused by the bite of a rabid dog or other animal. In a person 

 affected with it, convulsions are occasioned by the sight of a glittering 

 object, like water, by the sound of, running water, and by almost any 

 external impression. 



Hy'gi-ene (Gr. vylcta, hugieia, health). The art of preserving health and 

 preventing disease. 



Hy'per-o'pi-a. Abbreviated from Hy'per-me-tro'pi-a (Gr. virfy, huper, 

 beyond, utrpov, metron, the measure, and oty, ops, the eye). A defect 

 of vision dependent upon a too short eyeball ; so called because the 

 rays of light are brought to a focus at a point behind the retina ; the 

 true "far sight." 



In-ci'sor (L. inci'do, to cut). Applied to the front teeth of both jaws, 

 which have sharp cutting edges. 



In'cus (L.). An anvil ; the name of one of the bones of the middle ear. 



In-sal-i-va'tion (L. fn, and sa-li'va, the fluid of the mouth). The min- 

 gling of the saliva with the food during the act of chewing. 



In-spi-ra'tion (L. iw, and spi'ro, to breathe). The act of drawing in the 

 breath. 



In-teg'u-ment (L. in, and te'go, to cover). The skin, or outer covering 

 of the body. 



In-tes'tine (L. in'tus, within). The part of the alimentary canal which 

 is continuous with the lower end of the stomach ; also called the intes- 

 tines, or the bowels. 



I'ris (L. i'ris, the rainbow). The thin muscular ring which lies between 

 the cornea and crystalline lens, and which gives the eye its brown, 

 blue, or other color. 



Ju'gu-lar (L.ju'gulum, the throat). The name of the large veins which 

 run along the front of the neck. 



Lab'y-rinth (\apvpivdos, laburin'thos, a building with many winding pas- 

 sages). The very tortuous cavity of the inner ear, comprising the 

 vestibule, semi-circular canals, and the cochlea. 



Lach'ry-mal Apparatus (L. lach'ryma, a tear). The organs for forming 

 and conveying away the tears. 



Lac'te-als (L. Zac, lac'tis, milk). The absorbent vessels of the small 

 intestines ; during digestion they are filled with chyle, which has a 

 milky appearance. 



La-ryn' go-scope (Gr. \dpvy, larunx, the larynx, and <r/coir^w, skopeo, to 

 look at). The instrument by which the larynx may be examined in 

 the living subject. 



Lar'ynx (Gr.) The cartilaginous tube situated at the top of the wind- 

 pipe, or trachea ; the organ of the voice. 



Lens (L.) Literally, a lentil ; a piece of transparent glass or other sub- 

 stance so shaped as either to converge or disperse the rays of light. 



