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单词 pro-osteon
释义

> as lemmas

pro-osteon
pro-osteon n. Zoology Obsolete (W. K. Parker's term for) each of the ossifications forming the anterior lateral processes of the sternum in certain birds.
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keel1767
metosteon1868
pleurosteon1868
pro-osteon1868
manubrium1890
1868 W. K. Parker Monogr. Struct. & Devel. Shoulder-girdle & Sternum Vertebrata 144 In the genus Rhea..there is, on each side, an osseous centre in front of the first rib: it ossifies the costal process, and, projecting forwards as a wing in front of the sternal ribs, may be called the ‘pro-osteon’.
1896 A. Newton et al. Dict. Birds: Pt. IV 910 Thus in Rhea, Gallinæ, Turnix, Lestris and the Passeres, each anterior lateral process has its pro-osteon..,but in many other forms..these processes possess no special centre of ossification.
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