34 Life and Health 



Cau'da e-qui'na (Lat., horse's tail). The collection of large nerves 

 descending from the lower end of the spinal cord. 



Cell (Lat. cclla, a storeroom). One of the ultimate units of which all living 

 bodies are composed. A granular mass of protoplasm containing a nucleus. 



Cer'e-berium (Lat. dim. of cerebrum* the brain). The part of the brain 

 lying below the cerebrum and above the pons and medulla oblongata. 



Cer'e-brum. The brain proper, occupying the upper portion of the skull. 



Ce-ni'mi-nous (Lat. cerumen, ear wax). Pertaining to cerumen, or ear wax. 



Chlo'ral. A powerful drug and narcotic poison used to produce sleep. 



Chlo'ro-form. A narcotic poison generally used by inhalation ; of extensive 

 use in surgical operations to produce anaesthesia. 



Chon'drin (Gr. x6v5/x>s, cartilage). A kind of albuminoid resembling gela- 

 tine obtained by boiling cartilage. 



Chor'dae ten-di'ne-ae. Tendinous cords,. connecting the papillary muscles 

 of the heart with the auriculo-ventricular valves. 



Cho'roid (Gr. ykpiov, skin, and efSos, form). The middle coat of the eyeball. 



Cil'i-a (Lat. pi. of cilium, an eyelash). Minute thread-like processes found 

 upon the cells of the air passages and other parts. 



Cil'ia-ry mus'cle. A small muscle of the eye which assists in accom- 

 modation. 



Cir'cum-val'late (Lat. circum, around, and vallum, a rampart). The name 

 given to certain papillae of the tongue. 



Co-ag'u-la'tion (Lat. coagular'e, to curdle). The process by which a liquid 

 like blood or milk clots, or solidifies. 



Co'ca-ine. A bitter, white substance obtained from the leaves of coca, 

 capable of producing local insensibility to pain when applied to the 

 surface of mucous membranes or injected under the skin. 



Coch'le-a (Lat. cochlea, a snail shell). The spiral cavity of the internal ear. 



Co-lum'nae car'ne-ae. Fleshy projections in the ventricles of the heart. 



Co 'ma (Gr. KW/LUI, lethargy). A deep stupor from which it is difficult or 

 impossible to arouse a person. 



Com'mis-sure (Lat. con, together, and mittere, to put). A bridge-like 

 structure uniting similar parts. 



Com'press. A pad or bandage applied directly to an injury. 



Con'cha (Gr. xoyx^ * mussel shell). The shell-shaped portion of the 

 external ear. 



Con-ges'tion (Lat. con, together, and gcrere, to bring). Abnormal collec- 

 tion of blood in a part or organ. 



Con'junc-ti'va (Lat. con, together, and jurtgere, to join). A thin layer of 

 mucous membrane which lines the eyelids and covers the front of the 

 eyeball, thus joining the latter to the lids. 



