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PLANULA - Definiția din dicționar

Traducere: română


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‖Plan"u*la (?), n.; pl. Planulæ (#). [L., a little plane.] 1. (Biol.) 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.
[1913 Webster]

2. (Zo&ö;l.) The very young, free-swimming larva of the cœlenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.
[1913 Webster]