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[plan-yuh-luh] /ˈplæn yə lə/
noun, plural planulae
[plan-yuh-lee] /ˈplæn yəˌli/ (Show IPA).
the ciliate, free-swimming larva of a coelenterate.
Origin of planula
1865-70; < New Latin, diminutive of Latin plānum something flat. See plane1, -ule
Related forms
planular, planulate
[plan-yuh-leyt] /ˈplæn yəˌleɪt/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for planula
  • When a planula finally settles, it turns into a single coral polyp.
British Dictionary definitions for planula


noun (pl) -lae (-ˌliː)
the ciliated free-swimming larva of hydrozoan coelenterates such as the hydra
Derived Forms
planular, 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
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planula in Science
Plural planulae (plān'yə-lē')
The flat, free-swimming, ciliated larva of a cnidarian.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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