blastula


blastula
blastula [blas′tyo͞o lə]
n.
pl. blastulas or blastulae [blas′tyo͞olē΄] [ModL, dim. < Gr blastos, a sprout]
an embryo at the stage of development in which it consists of usually one layer of cells around a central cavity, forming a hollow sphere
blastular [blas′tyo͞olər]
adj.
blastulation [blas′tyo͞olā′shən]
n.

English World dictionary. . 2014.