English dictionary
planula
/'pl/&/n/j//@/l/@/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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the flat ciliated free-swimming larva of hydrozoan coelenterates
Source: WordNet 3.0
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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 <i>gastrula</i>.
Source: webster1913