444 GLOSSARY 



Hy-dro-gen (hy'dro-jen) (Gr. hudor, water, and genein, to generate), a 

 light, colorless gas. When ignited it unites with oxygen to form water. 



Hygiene (hy'ji-een) (Gr. hugieinos, healthy), the science which tells 

 how to keep living bodies in good working order. 



Hy-po-der'mic injection (Gr. hupo, under, and derma, skin), the intro- 

 duction of a solution under the skin by means of a hollow needle 

 and syringe. The solution fills the lymph spaces and is absorbed 

 into the capillaries or enters the circulation by way of the 

 lymph. 



Hys-te'ri-a, a nervous disease in which there is great lack of self-con- 

 trol. The sufferer easily gives way to the emotions, and especially 

 to those of sorrow or mirth. 



Il'e-um (Gr. eilein, to twist), the lower half of the small intestine. 



In-ci'sor eeth (Lat. inddere, to cut into), the teeth in front, with which 

 food is bitten into. 



Incus (irikus) (Lat. incus, anvil), the middle bone of the chain in the 

 ear drum, which transmits waves of sound from the drumhead to 

 the inner ear. 



Jn-fec'tious disease (Lat. in, in, and facere, to make), a disease which 

 has for its cause some matter which can multiply and grow when 

 introduced into the body of a healthy man. 



In-flam-ma'tion (Lat. in, in, and flamma, a flame), redness, swelling, 

 pain, and increased heat in a part as a result of injury. It is nature's 

 attempt to repair the part. Often it goes on to form matter. 



In-san'i-ty (Lat. in, not, and sanus, safe), unsoundness of mind per- 

 sisting for a considerable time. 



In-spi-ra'tion (Lat. in, in, and spirare, to breathe), taking a breath 

 into the lungs. 



In-tem'per-ance (Lat. in, not, and temper are, to regulate), gratifica- 

 tion of a desire which does not denote a real need of the body. 



In-tes'tine (Lat. intus, within), the long tube in the abdomen in which 

 digestion of food is completed after it leaves the stomach. 



In-tox-i-ca'tion (Lat. in, in, and toxicum, poison), great mental excite- 

 ment or lack of control, usually due to alcohol. 



I'ris (Gr. iris, rainbow), the colored curtain in the eye behind the cornea. 



Jaundice (jahn'&s} (Fr.jaune, yellow), yellowness of the skin due to 

 a deficient excretion of bile by the liver. 



