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单词 precoracoid
释义

precoracoidn.adj.

Brit. /priːˈkɔːrəkɔɪd/, U.S. /priˈkɔrəˌkɔɪd/
Forms: 1800s– praecoracoid (now rare), 1800s– precoracoid.
Origin: Formed within English, by derivation. Etymons: pre- prefix, coracoid n.
Etymology: < pre- prefix + coracoid n.
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).
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n.adj.1869
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