| 单词 | yolk plug |
| 释义 | > as lemmasyolk plug yolk plug n. a mass of cells containing deutoplasm or yolk (sense 1c), located between the dorsal and ventral lips of the amphibian blastopore. ΘΚΠ the world > animals > fish > parts of fish > [noun] > cells in ovum yolk plug1872 1872 H. Power tr. W. Waldeyer in Stricker's Man. Human & Compar. Histology II. xxv. 199 The most external germinal layer, from which the greatest part of the epidermoid structures are developed, on both sides of Ecker's yolk plug (Dotterpfropf). 1959 T. R. E. Southwood & D. Leston Land & Water Bugs Brit. Isles 299 Fertile eggs [of the bug Capsus ater] commence to develop at once and the grey band of the yolk plug forms just below the operculum about 2 weeks after laying. 2001 Jrnl. Chem. Ecol. 27 1779 For the morphometric analysis we measured standard length and then weighed each specimen (after towel drying), removed the yolk plug, and re-weighed the specimen to determine the mass of the yolk plug. < as lemmas |
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