“after、shaft”的英文意思_释义_用法

单词

after-shaft

释义

ˈafter-shaft Ornith.
[tr. mod.L. hyporachis.]
= hyporachis.
1867W. S. Dallas tr. Nitzsch's Pterylography I. i. 8 The aftershaft originates from the underside of the feather beneath the umbiliciform pit.1871T. H. Huxley Man. Anat. Vertebr. Anim. vi. 274 In very many birds each quill bears two vexilla; the second, called aftershaft (hyporachis), being attached on the under side of the first close to the superior umbilicus.1884E. Coues Key N. Amer. Birds (ed. 2) 84 The after-shaft, when well developed, is like a duplicate in miniature of the main feather, from the stem of which it springs, at junction of calamus with rhachis, close to the umbilicus.

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