GLOSSARY 391 



Circumduction. Leading around. This is the motion made when a part, is moved 



around in a circle, one end being stationary. The extremities, the digits and 



the head, may be circumducted. 



Circumflex. To bend around. Circumflex arteries wind around the arm or thigh. 

 Circumvallate. Walled around. The circumvallate papillae at the base of the 



tongue are encircled by a ridge. 



Clavicle. The clavicula, which resembles a very ancient key. 

 Climacteric. Literally, the round of a ladder. Any time of life when the system is 



believed to undergo marked and permanent changes; usually applied to the 



time of the cessation of menstruation. 

 Coagulation. From coagulare, to curdle. The clotting of blood. Coagulum, a 



blood clot. 

 Coccyx. A cuckoo's beak. The bone at the end of the spinal column, named from 



its shape. 

 Cochlea. A conch-shell. A cavity of the internal ear resembling a snail-shell in 



form. 

 Collateral. From words meaning side and together. Collateral circulation is secured 



by the union of branches of two vessels, whereby the main current of fluid may 



be carried by this side route if necessary. 

 Colliquative. Literally a melting together. Colliquative stools are profuse and 



watery. 

 Commissure. A placing together. A commissure connects two parts of an organ, 



as the commissures of the brain. 

 Communis. Common. Applied to a muscle whose tendons are common to several 



organs. 



Concha. A shell. 



Condyle. A knuckle. A rounded eminence of bone. 



Conjunctiva. Connecting. The mucous membrane which connects the under sur- 

 faces of the eyelids. 

 Conoid. Shaped like a cone. 

 Convoluted. Twisted. 

 Co-ordinate. From words meaning together, and to order or regulate. Co-ordination 



is the systematic acting together of several parts. 

 Coracoid. Like a crow's beak. The coracoid process of the scapula. 

 Corium. Leather. The deep portion of the skin from which leather is made. 

 Cornea. Horny. The tough transparent -membrane in the anterior of the eyeball. 

 Cornua. Plural of cornu, a horn. 



Coronal or coronoid. Pertaining to, or resembling a crown. 

 Coronary. The coronary arteries encircle the base of the heart. 

 Corpus callosum. The transverse commissure of the cerebral hemispheres. 

 Corpuscle. A little body. A blood cell. Malpighian corpuscle, a structure in the 



kidney. Lymph corpuscle, a cell formed in a lymph gland. 

 Corpus luteum. Yellow body. The substance formed in a ruptured Graafian 



follicle of the ovary. 



Cortex. Bark. The superficial layer, as the cortex of the brain. 

 Costal. Relating to a rib or costa. 



Coxae. Plural of coxa, the hip; also the genitive form, as os coxa, the bone of the hip. 

 Cranium. The part of the skull which contains the brain. 

 Crest. A ridge of bone, either on a surface or at the border. 

 Cretinism. The condition of a cretin or undeveloped person, both mentally and 



physically. 



Cribriform. Resembling a sieve. 



Cricoid. Like a ring. The cricoid cartilage of the larynx is shaped like a seal ring. 

 Crucial. Like a cross. The crucial iigaments cross each other. 

 Crural. .Belonging to or like the lower extremity, from crus, a leg; as the crural 



nerve, the crura (or legs) of the diaphragm. 

 Cystic. Relating to a cyst, or a sac containing fluid (cystic duct). A cystic ovary has 



cysts developed from its substance. 

 Deglutition. The act of swallowing. 

 Deltoid. Shaped like the Greek letter delta, A. 

 Dental. From dens, a tooth, belonging to a tooth. 

 Dentated. Having points which resemble teeth. 

 Dentition. The eruption or "cutting" of the teeth. 



