Discoidal Cleavage


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discoidal cleavage

[dis′kȯid·əl ′klē·vij]
(embryology)
A type of cleavage producing a disc of cells at the animal pole.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Discoidal Cleavage

 

a type of egg cleavage in animals with telolecithal eggs (scorpions, cephalopod mollusks, cartilaginous and bony fish, reptiles, and birds). In discoidal cleavage, only a small disk of nucleus-containing cytoplasm divides, and this disk is relatively free of the yolk.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.