单词 | precoracoid |
释义 | precoracoidn.adj. Zoology. A. n. A bone or cartilage in certain fishes, amphibians, reptiles, and birds, situated anterior to and sometimes fused with the coracoid bone of the pectoral girdle. ΘΚΠ the world > animals > fish > parts of fish > [noun] > bones (various types of) grate1481 pharyngeal1791 suboperculum1818 supratemporal1834 shackle-joint1837 mastoid1840 wrist1840 mastoid bone1841 subopercular1841 mesotympanic1846 suprascapula1846 hypobranchials1848 hypotympanic1848 urohyal1848 radius1854 epicentral1866 pterotic1866 mesocoracoid1868 supraclavicle1868 precoracoid1869 symplectic1870 hypural1871 mesopterygoid1871 post-temporal1871 postclavicle1872 brachial1873 urostyle1875 hypercoracoid1876 admaxillary1885 intercalarium1887 palatopterygoquadrate1888 subtectal1888 Weberian apparatus1889 Weberian ossicles1889 radial1890 supracleithrum1903 1869 W. K. Parker in Philos. Trans. (Royal Soc.) 159 770 The simple clavicular membrane-bone grafts itself upon the detached precoracoid of the Fowl. 1875 T. H. Huxley & H. N. Martin Course Elem. Biol. (1877) 221 The posterior end articulates with the præcoracoids and the clavicles. 1964 T. J. Parker & W. A. Haswell Text-bk. Zool. (ed. 7) II. 101 In relation with the pre-coracoid is formed a bone, the clavicle.., largely or entirely developed independently of pre-existing cartilage. 1980 Gray's Anat. (ed. 36) iii. 358/2 The primitive reptilian pectoral girdle comprises a dorsal element—the scapula—and two ventral elements, of which the anterior (cranial) is the precoracoid and the posterior (caudal) is the coracoid. B. adj. Situated anterior to the coracoid bone; spec. designating the bone or cartilage forming the precoracoid. ΚΠ 1871 Amer. Naturalist 5 587 The presence of the præcoracoid arch..and the nonseparation of the parietal bones by the supraoccipital. 1897 Science Feb. 290/1 It is not expected that when the precoracoid bone of the cod is hyperostosed..that other portions of the suspensorium should participate. 1935 Q. Rev. Biol. 10 407/1 In Salientia the precoracoid and epicoracoid cartilages..surrounded the space. 1986 A. S. Romer & T. S. Parsons Vertebr. Body (ed. 6) vii. 202 Precoracoid process of coracoid plate. Derivatives ˌprecoraˈcoidal adj. now rare = sense B. ΚΠ 1869 W. K. Parker in Philos. Trans. (Royal Soc.) 159 770 Like the precoracoidal segment, the basipterygoid plates..are late in their appearance. 1875 Encycl. Brit. I. 761/2 The pectoral arch in the Amphibia is distinguishable into a scapular, a coracoidal, and a præcoracoidal region. 1911 Encycl. Brit. III. 963/1 From the inner side of the neck of the coracoid arises the precoracoidal process, the remnant of the precoracoid. This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022). < n.adj.1869 |
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