the GNU version of the Collaborative International Dictionary of English
n. The germinal vesicle.
The Century Dictionary and Cyclopedia
n. The germinal vesicle. N. E. D. See blastoderm.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the blastula of a placental mammal in which some differentiation of cells has occurred
Word Usage
"Douglas, if you truly believe that a blastocyst is morally equivalent to a (let's say) four year old boy, then they are indeed butchering and murdering them, and an evil larger than the Nazi Holocaust is going on."