AURICULA (L. dim of _auris_, the ear). An auricle; the prominent part of the ear. Also, the name of two cavities of the heart. AUTOMATIC MOTIONS (Gr. _automatos_, of his own accord). Those muscular actions which are not dependent on the mind. B BILIS. Bile, gall, or choler; the secretion of the liver. A term employed to characterize a class of diseases caused by a too copious secretion of bile. BRONCHUS (Gr. _bróngchos_, the windpipe, from _bréchō_, to moisten). The windpipe; a ramification of the trachea; so called from ancient belief that the solids were conveyed into the stomach by the œsophagus, and the fluids by the bronchia. BRONCHIAL-TUBES. The minute ramifications of the bronchi, terminating in the _bronchial cells_, or air cells of the lungs. BRONCHITIS. Inflammation of the bronchi or ramifications of the trachea. BURSÆ MUCOSÆ (_mucous bags_). Small sacs situated about the joints, being parts of the sheaths of tendons. C CÆCUM, or CŒCUM (L. _cæcus_, blind). The first part of the colon or _blind_ intestine. CALLUS (Latin, _hardness_). New bone, or the substance which serves to join together the ends of a fracture, and to restore destroyed portions of bone. CAPILLARY (L. _capillus_, a hair). Resembling a hair in size; a term applied to the _vessels_ which intervene between the minute arteries and veins. CAPSULA (L. dim. of _capsa_, a chest). Literally, a little chest. A capsule or bag, which incloses any part. CARBON (L. _carbo_, a coal). A substance well known under the form of coal, charcoal, lamp-black, &c. In chemical language, it denotes the pure inflammable principle of charcoal; in its state of absolute purity it constitutes the _diamond_. CARBONIC ACID. Carbon and oxygen combined. CARDIA (Gr. _kardia_, the heart). The entrance into the stomach; so called from being near the heart. CARDIAC (Gr. _kardia_, the heart). Relating to the heart. CAROTID (Gr. _karóō_, to induce sleep). The name of two large arteries of the neck; so called from an idea that tying them would induce stupor. CARPUS (Gr. _karpós_, fruit). The wrist. The _ossa carpi_, or carpal bones, are eight in number, and form two rows. CARTILAGE. Gristle. It is attached to bones, and must be distinguished from the ligaments of joints and tendons of muscles. CEREBELLUM (dim. of _cerebrum_). The little brain, situated behind the larger or cerebrum. CEREBRUM (Gr. _káre_, the head). The brain; the chief portion of the brain, occupying the whole upper cavity of the skull. CEREBRO-SPINAL. System. CERVIX. The neck; the hinder part of the neck. The fore part is called _collum_.