Hyper Dictionary

English Dictionary Computer Dictionary Video Dictionary Thesaurus Dream Dictionary Medical Dictionary


Search Dictionary:  

Meaning of PLANULA

Pronunciation:  'planyulu

 
WordNet Dictionary
 
 Definition: 
[n]  the flat ciliated free-swimming larva of hydrozoan coelenterates
 

PLANULA is a 7 letter word that starts with P.

 

 See Also: hydroid, hydrozoan

 

 

Webster's 1913 Dictionary
 
 Definition: 
\Plan"u*la\, n.; pl. {Planul[ae]}. [L., a little plane.]
1. (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}.



2. (Zo["o]l.) The very young, free-swimming larva of the
   c[oe]lenterates. It usually has a flattened oval or oblong
   form, and is entirely covered with cilia.

 

 

COPYRIGHT © 2000-2013 HYPERDICTIONARY.COM HOME | ABOUT HYPERDICTIONARY