The Collaborative International Dictionary
Periblast
Periblast \Per"i*blast\, a. [Gr. ? to grow around. See Peri-, and -blast.] (Biol.) The protoplasmic matter which surrounds the entoblast, or cell nucleus, and undergoes segmentation. -- Per`i*blas"tic, a.
Wiktionary
periblast
n. (context biology English) The protoplasmic matter which surrounds the entoblast, or cell nucleus, and undergoes segmentation.