The Collaborative International Dictionary
Blastide
Blastide \Blas"tide\, n. [Gr. blasto`s sprout, fr. ? to grow.] (Biol.) A small, clear space in the segments of the ovum, the precursor of the nucleus.
Wiktionary
blastide
n. (context biology English) A small clear space in the segments of the ovum, the precursor of the nucleus.