| 释义 |
micromere Embryology.|ˈmaɪkrəʊmɪə(r)|
[f. Gr. µικρό-ς small + µέρος part.]
The smaller of the two masses into which the vitellus of the developing ovum of Lamellibranchiata divides (cf. macromere). Hence ˈmicromeral, microˈmeric adjs., of or pertaining to the micromere.
1877Huxley Anat. Inv. Anim. viii. 484 Layer of blastomeres, of which those of one hemisphere have proceeded from the micromere, and those of the other from the macromere. Ibid. 498 The edges of the micromeral layer. 1886Jrnl. R. Microsc. Soc. Ser. ii. VI. i. 224 The segmentation resembles that of other molluscs, the ‘micromeres’ appearing at the formative pole by separation of the ‘protoplasmic’ portion of the ‘macromeres’. |