• synonyms


noun, plural plan·u·lae [plan-yuh-lee] /ˈplæn yəˌli/. Zoology.
  1. the ciliate, free-swimming larva of a coelenterate.
Show More

Origin of planula

1865–70; < New Latin, diminutive of Latin plānum something flat. See plane1, -ule
Related formsplan·u·lar, plan·u·late [plan-yuh-leyt] /ˈplæn yəˌleɪt/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for planula

Historical Examples

British Dictionary definitions for planula


noun plural -lae (-ˌliː)
  1. the ciliated free-swimming larva of hydrozoan coelenterates such as the hydra
Show More
Derived Formsplanular, adjective

Word Origin

C19: from New Latin: a little plane, from Latin plānum level ground
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

planula in Science


Plural planulae (plănyə-lē′)
  1. The flat, free-swimming, ciliated larva of a cnidarian.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.