Planula
[plænjulә]
解释:
(n.) In embryonic development, a vesicle filled with fluid, formed from the morula by the divergence of its cells in such a manner as to give rise to a central space, around which the cells arrange themselves as an envelope; an embryonic form intermediate between the morula and gastrula. Sometimes used as synonymous with gastrula.
(n.) The very young, free-swimming larva of the coelenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.
卡拉校对
解释:
n. the locomotory embryo of the cœlenterates.—adjs. Plan′ular; Plan′uliform; Plan′uloid.
校对:朱莉娅