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/ˈplæn.jʊ.lə/ · noun
(biology) 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..
Use planula when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Planula means (biology) 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..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use planula where its definition matches the intended context.
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