Lexic.us

Definition of Planula

1. Noun. The flat ciliated free-swimming larva of hydrozoan coelenterates.

Definition of Planula

1. 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.

Definition of Planula

1. 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. ¹

2. Noun. (zoology) The larva of a hydrozoan, which is free-swimming and covered in cilia. ¹

¹ Source: wiktionary.com

Definition of Planula

1. the free-swimming larva of certain organisms [n -LAE] : PLANULAR [adj]

Medical Definition of Planula

1. Origin: L, a little plane. 1. 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. 2. The very young, free-swimming larva of the coelenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Planula

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