The Collaborative International Dictionary
Archiblastula
Archiblastula \Ar`chi*blas"tu*la\, n. [Pref. archi + blastula.] (Biol.) A hollow blastula, supposed to be the primitive form; a c[oe]loblastula.
Wiktionary
archiblastula
n. (context biology English) A hollow blastula, supposed to be the primitive form.