Cephalic index(Anat.), the ratio of the breadth of the cranium to the length, which is taken as the standard, and equal to 100; the breadth index.Cephalic vein, a large vein running from the back of the head alond the arm; — so named because the ancients used to open it for disorders of the head. Dunglison.

(Ce*pha"lic), n. A medicine for headache, or other disorder in the head.

(||Ceph`a*li"tis) n. [NL., fr. Gr. kefalh` head + -itis.] (Med.) Same as Phrenitis.

(Ceph`a*li*za"tion) n. Domination of the head in animal life as expressed in the physical structure; localization of important organs or parts in or near the head, in animal development. Dana.

(Ceph"a*lo-) kefalh` head.]—> A combining form denoting the head, of the head, connected with the head; as, cephalosome, cephalopod.

(Ceph`a*lo*cer"cal) a. [Cephalo- + Gr. tail.] (Zoöl.) Relating to the long axis of the body.

(Ceph"a*loid) a. [Cephalo- + -oid.] Shaped like the head. Craing.

(Ceph`a*lol"o*gy) n. [Cephalo- + -logy.] The science which treats of the head.

(Ceph"a*lo*mere) n. [Cephalo- + -mere.] (Zoöl.) One of the somites (arthromeres) which make up the head of arthropods. Packard.

(Ceph`a*lom"e*ter) n. [Cephalo- + -meter.] (Med.) An instrument measuring the dimensions of the head of a fetus during delivery.

(||Ceph"a*lon) n. (Zoöl.) The head.

(||Ceph`a*loph"o*ra) n. pl. [NL., fr. Gr. kefalh` head + to bear.] (Zoöl.) The cephalata.

(Ceph"a*lo*pod Ceph"a*lo*pode) , n. (Zoöl.) One of the Cephalopoda.

(||Ceph`a*lop"o*da) n. pl. [NL., gr. Gr. kefalh` head + -poda: cf. F. céphalopode.] (Zoöl.) The highest class of Mollusca.

They have, around the front of the head, a group of elongated muscular arms, which are usually furnished with prehensile suckers or hooks. The head is highly developed, with large, well organized eyes and ears, and usually with a cartilaginous brain case. The higher forms, as the cuttlefishes, squids, and octopi, swim rapidly by ejecting a jet of water from the tubular siphon beneath the head. They have a pair of powerful horny jaws shaped like a parrot's beak, and a bag of inklike fluid which they can eject from the siphon, thus clouding the water in order to escape from their enemies. They are divided into

(||Ceph`a*lan"thi*um) n. [NL., fr. Gr. + flower.] (Bot.) Same as Anthodium.

(||Ceph`a*las"pis) n. [NL., fr. Gr. kefalh` head + a shield.] (Paleon.) A genus of fossil ganoid fishes found in the old red sandstone or Devonian formation. The head is large, and protected by a broad shield-shaped helmet prolonged behind into two lateral points.

(||Ceph`a*la"ta) n. pl. [NL., fr. Gr. kefalh` head.] (Zoöl.) A large division of Mollusca, including all except the bivalves; — so called because the head is distinctly developed. See Illustration in Appendix.

(Ceph"a*late) a. (Zoöl.) Having a head.

(Ce*phal"ic) a. [L. cephalicus, Gr. fr. kefalh` head: cf. F. céphalique.] (Anat.) Of or pertaining to the head. See the Note under Anterior.

  By PanEris using Melati.

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