| 单词 | morpholecithus | 
| 释义 | † morpholecithusn. Embryology. Obsolete. rare.   Haeckel's term for: the part of an ovum (or its yolk) which undergoes cleavage. Cf. tropholecithus n. at tropho- comb. form 1. ΚΠ 1879    tr.  E. Haeckel Evol. Man I. viii. 214  				The formative yelk (vitellus formativus, or morpholecithus) is the nucleated egg-cell, capable of evolution. 1890    Cent. Dict.  				Morpholecithus, in embryol., the vitellus formativus, or formative yolk, which undergoes segmentation and germination. This is a new entry (OED Third Edition, December 2002; most recently modified version published online June 2019). < | 
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