Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The flat, free-swimming, ciliated larva of a cnidarian.

from The Century Dictionary.

  • noun The ordinary locomotory embryo of the cœlenterates, which is of flattened form, mouthless, ciliate, and free-swimming.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (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.
  • noun (Zoöl.) The very young, free-swimming larva of the cœlenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • 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.
  • noun zoology The larva of a hydrozoan, which is free-swimming and covered in cilia.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the flat ciliated free-swimming larva of hydrozoan coelenterates

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin plānula, from Latin, feminine diminutive of plānus, flat (from its shape); see pelə- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Latin, a little plane.

Examples

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.