ooblast

ooblast

 [o´o-blast]
a primordial cell from which an oocyte (ovum) ultimately develops.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ooblast

(1) The embryonic cell from which oocytes develop. 
(2) Oogonium.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.