| 单词 | rostral bone |
| 释义 | > as lemmasrostral bone rostral bone n. †(a) Anatomy the coracoid process (see sense A. 1) (obsolete rare); (b) Zoology and Palaeontology a bone forming part of the rostrum or snout of various vertebrates; spec. a bone located in front of the premaxillary bones in a ceratopsian dinosaur, forming the upper part of a parrot-like beak. ΘΚΠ the world > life > the body > structural parts > bone or bones > bony support for limbs > shoulder-girdle > [noun] > shoulder bone > coracoid process rostral bonea1400 rostral?a1425 rostrate bonec1475 coracoid process1741 coracoid1828 a1400Boon rostral [see sense A. 1]. 1866 R. Owen On Anat. Vertebr. II. 344 In the Perameles lagotis the bony case of the nasal passage is further increased by the presence of two small rostral bones, resulting, as in the Hog, from ossification of the nasal cartilage. 1889 O. C. Marsh in Amer. Jrnl. Sci. 38 503 In front of the premaxillaries, there is a large massive bone, not before seen in any vertebrate, which has been called by the writer, the rostral bone (os rostrale). 1930 Copeia No. 4 129 The illicium of the Aceratiidae has not become lost, however, but modified into an internal rostral bone of a pincher-like structure. 2001 Evolution 55 1432/2 Examples include..the predentary bone of ornithischian and rostral bone of ceratopsian dinosaurs. < as lemmas |
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