GLOSSARY. 255 



CONCH' A (Gr. noyxrj, konche, a mussel-shell). The external shell- 

 sliap jd portion of the external ear. 



OON-JTTNC-TI'VA (L. con and jurigo, to join together). A thin layer 

 of mucous membrane which lines the eyelids and covers the front 

 of the eyeball ; thus joining the latter to the lids. 



OON-TRAC-TIL'I-TY (L. con and tra'ho, to draw together). The prop- 

 erty of a muscle which enables it to contract, or draw its extrem- 

 ities closer together. 



OON-VO-VQ'TIONS (L. con and vol'vo, to roll together). The tortuous 

 foldings of the extenal surface of the brain. 



CON-VUJ/SION (L. convel'lo, to pull together). A more or less violent 

 agitation of the limbs or body. 



COR'NE-A (L. cor'nu, a horn). The transparent, horn-like substance 

 which covers the anterior fifth of the eyeball. 



COR'FUS-CLES, BLOOD (L. dim. of cor' pus, a body). The small bicon- 

 cave disks which give to the blood its red color ; the white cor- 

 puscles are globular and larger. 



COS-MET'IC (Gr. nodjusoa, kosmeo, to adorn). Beautifying; applied 

 to articles which are supposed to increase the beauty of the 

 skin, etc. 



CRA'NI-AL (L. cra'nium, the skull). Pertaining to the skull. The 

 nerves which arise from the brain are called cranial nerves. 



CKI'COID (Gr. KpixoS, kri'kos, a ring). A cartilage of the larynx, 

 resembling a seal-ring in shape. 



CRYS'TAL-LINE LENS (L. crystal'lum, a crystal). One of the so-called 

 humors of the eye ; a double convex body situated in the front part 

 of the eyeball. 



CU'TI-CLE (L. dim. ofcu'tis, the skin). The scarf-skin ; also called 

 the epider'mis. 



CU'TIS (Gr. <5nvro$ % skutos, a skin or hide). The true skin, lying 

 beneath the cuticle ; also called the der'ma. 



DE-CUS-SA'TION (L. decus'sis, the Roman numeral ten, X). A re- 

 ciprocal crossing of fibres from side to side. 



DI'A-PHRAGM (Gr. dtacppdddoo, diaplirasso, to divide by a partition). 

 A large, thin muscle which separates the cavity of the chest from 

 the abdomen ; a muscle of respiration. 



DIF-FUS'ION OF GASES. The power of gases to become intimately 

 mingled, without reference to the force of gravity. 



DUCT (L. du'co, to lead). A narrow tube ; the flwracic duct is the 

 main trunk of the absorbent vessels. 



DU-O-DE'NUM (L. duode'ni, twelve). The first division of the small 

 intestines, about twelve fingers-breadth long. 



