planula

== English == === Etymology === Borrowed from Latin plānula, diminutive of plāna (“plane”). === Pronunciation === (Received Pronunciation) IPA(key): /ˈplæn.jʊ.lə/ (General American) IPA(key): /ˈplæn.jə.lə/ === Noun === planula (plural planulae) (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. (zoology) The larva of a hydrozoan, which is free-swimming and covered in cilia. ==== Derived terms ==== coeloplanula planular planulate planuliform planuloid == Czech == === Pronunciation === IPA(key): [ˈplanula] === Participle === planula inflection of planout: feminine singular past active participle neuter plural past active participle