from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative form of blastodisk.
from the GNU version of the Collaborative International Dictionary of English
- n. a disc-shaped layer of cells on the surface of the yolk mass of an egg (such as that of a bird) which develops to form the embryo.
from The Century Dictionary and Cyclopedia
- n. An aggregation of formative protoplasm at one pole of the fertilized ovum.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a layer of cells on the inside of the blastula
Sorry, no etymologies found.