| 单词 | yolk bag |
| 释义 | > as lemmasyolk bag yolk bag n. = yolk sac n. Π 1807 W. Lawrence tr. J. F. Blumenbach Short Syst. Compar. Anat. xxvii. 478 A small, round, milk-white spot, called the tread of the cock, (citatricula or macula), is formed on the surface of the yolk-bag [Ger. des Dotters]. 1905 Country-side 11 Nov. 395 With the disappearance of the yolk-bag the ‘fry’ stage is entered upon. 2012 N. Murtagh Backyard Duck Bk. (rev. ed.) ii. 7 The chalazae (twisted strings by which the yolk bag is held in position) are also added at this stage. < as lemmas |
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