| 释义 |
coronoid, a. and n. Anat.|ˈkɒrənɔɪd, kɒˈrəʊnəʊɪd|
[mod. f. Gr. κορώνη crow: see -oid.]
A. adj. Applied to processes of bones of a curved form like a crow's beak, and to parts in connexion with these; esp. the c. process of the lower jaw, and that of the ulna, and the c. fossa of the humerus.
1741A. Monro Anatomy (ed. 3) 27 Such Processes as terminate in a sharp Point, have the general Name of coronoid bestowed on them. 1808Reeve ibid. XCVIII. 177 The zygomatic process terminates at the coronoid process of the lower jaw. 1865Reader No. 139. 242/3 The coronoid origin of this muscle. 1882Syd. Soc. Lex., Coronoid fossa, a depression above the inner segment of the trochlear surface of the lower end of the humerus for the reception of the coronoid process of the ulna in flexion of the forearm.
B. n. Any of several bones in the lower jaw of certain lower vertebrates.
1888Rolleston & Jackson Forms Anim. Life (ed. 2) 339 To the quadrate region belongs the squamosal; to the mandible a dentary, and in Sauropsida a splenial, coronoid, angular, and supra-angular. 1903Proc. Zool. Soc. 17 Mar. 267 In Eudynamys, Cuculus, and Guira the rami are pierced by a long lateral vacuity, which is partly closed by a long and slender coronoid. 1951G. R. de Beer Vertebrate Zool. (ed. 2) xx. 257 Cynognathus has a large dentary, while the articular, angular, supra-angular, prearticular, coronoid, and splenial are small. |