- the ciliate, free-swimming larva of a coelenterate.
Origin of planula
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for planula
In Aeginopsis a planula is formed by multipolar immigration.
The planula has its two extremities dissimilar (Bipolaria-larva).
The one group contains the larva of the Cœlenterata or Planula, the other group the larv of all the other forms.
The Planula is very probably the ancestral form of the Cœlenterata.
This new individual is at first an active free-swimming larva called a planula, which does not resemble either a medusa or polyp.Elementary Zoology, Second Edition
Vernon L. Kellogg
- the ciliated free-swimming larva of hydrozoan coelenterates such as the hydra
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
- The flat, free-swimming, ciliated larva of a cnidarian.
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