Part 138

CEN´TRUM, n.; pl. centra. Body of a vertebra.

CEPH´ALAD. Forwards; towards the head.

CEPHAL´IC, a. Pertaining to the head.

CEPHALO-CER´CAL (axis), a. Denoting the long axis of the body.

CE´RA, CERE, CERO´MA, n. Fleshy, cutaneous or membranous, often feathered, covering of base of bill of many birds, as parrots, hawks, and owls; differing thus in texture from the rest of the rhamphotheca, and usually also showing an evident line of demarcation. When present, the nostrils are always pierced in its substance,—at least at its edge.

CERATOHY´AL, n. A portion of the “horn” of the hyoid bone.

CER´CAL, a. Pertaining to the tail. (Little used.)

CEREBEL´LAR, a. Pertaining to the cerebellum.

CEREBEL´LUM, n. Little brain; the hinder, lower, smaller mass of the brain, in birds striate transversely.

CER´EBRAL, a. Pertaining to the brain.

CER´EBRO-SPINAL (axis or column). The whole neural axis, or column of nerve-substance enclosed in the spinal canal and cranium.

CER´EBRUM, n. Brain proper, or larger brain, as distinguished from the cerebellum.

CERU´MEN, n. Ear-wax.

CER´VICAL, a. Pertaining to the hind-neck; as, a cervical collar. Also, pertaining to the whole neck; as, cervical vertebræ.

CER´VIX, n. Hind-neck; from occiput to interscapulium, including nape and scruff. (48.)

CHALAZ´Æ, n. pl. Twisted filaments of condensed albumen forming a thread at each pole of the yolk, steadying it by attachment to the lining membrane of the egg, and balancing it in such manner that the “tread” stays uppermost.

CHALAZIF´EROUS, a. Denoting the layers of condensed albumen which form the chalazæ.

CHAR´ACTER, n. Any material attribute susceptible of definition for use in description and classification. Also, a sum of such attributes; as, of passerine character.

CHAS´MA, n. Decussation of the optic nerve.

CHEEK, n. Outside of base of lower jaw; also, the corresponding region of upper jaw. Compare GENÆ and MALAR REGION. (26.) (The term is differently employed by various writers, and is at best not definite.)

CHIN, n. Space between forks of lower jaw; upper throat. See MENTUM. (46.)

CHO´ROID, n. Vascular black membrane of the eye, between retina and sclerotic. Choroid plexus, a certain fold of the pia mater.

CHYLE, n. A certain intestinal fluid resulting from digestion.

CHYME, n. A certain product of incompleted digestion.

CICATRIC´ULA, n. Dark spot on the surface of a fecundated yolk. See YOLK.

CIL´IATED, a. Bristly; furnished with bristles, or small bristle-like feathers; fringed.

CIL´IUM, n.; pl. cilia. Bristly or hair-like feather, about the mouth and eyes especially. See VIBRISSA and SETA.

CINE´REOUS, a. Of an ashy color.