380 GLOSSARY 



Il'e-um (Lat., groin) : the last division of the small intestine. 



Il'i-ac arteries (Lat. ilium, the flank) : the arteries supplying the pel- 

 vis and its organs and the legs. 



Im-mune' (Lat. immunis, free, exempt) : exempt from a certain dis- 

 ease by nature, from inoculation, or from a previous attack. 



In-ci'sors (Lat. incidere, to cut in) : the eight front teeth. 



In'cus (Lat., anvil) : the middle one of the auditory ossicles, named 

 from its anvil-like shape. 



In-flam-ma'tion (Lat. inftammatio) : a diseased condition of a part of 

 the body, shown by excess of blood, swelling, and extra heat. 



In-hi-bi'tion (Lat. inhibere, to restrain) : the lowering or restraining 

 of the action of a nervous mechanism by nervous impulses from 

 a connected mechanism. 



In-hib'i-to-ry : restraining. 



In-nom'in-ate artery (Lat. innominatus, nameless) : one of the great 

 arteries rising from the arch of the aorta. It soon divides into the 

 right subclavian and the right common carotid artery. 



In-OC-U-la'tion (Lat. inoculare, to ingraft) : the introduction of the 

 germs of a disease through the skin, so as to give the disease. 



In-spi-ra'tion (Lat. in, in, and spirare, to breathe) : the act of breath- 

 ing in. 



In'su-la (Lat., an island) : a portion of the cortex of the brain lying 

 beneath the Sylvian fissure ; also called the island of Reil. 



In-ter-cos'tal (Lat. inter, between, and costa, rib) : between the ribs. 



In-tes'tin-al juice : the fluid secreted by the glands of the intestine. 

 It plays some part in the digestive process. 



In-tes'tine (Lat. intestinum) : the long tube leading from the stomach 

 to the anus ; the bowels. 



In-tra-cen'tral nerves (Lat. intra, within) : those nerves which form 

 lines of communication between the various nerve centers, as dif- 

 ferent parts of the brain and spinal cord. 



In-ver'te-brates (Lat. in-, without, and vertebratus, vertebrate): ani- 

 mals having no internal vertebral column. 



I'ris (Gr. and Lat., the rainbow) : the colored portion of the eye, hav- 

 ing in its center the pupil. 



Ir-ri-ta-bil'i-ty (Lat. irritare,to excite) : "the power possessed by living 

 cells of reacting under stimulus. 



Je-ju'num (Lat., empty) : the middle portion of the small intestine, 

 between the duodenum and the ileum. 



