The Collaborative International Dictionary
Triploblastic
Triploblastic \Trip`lo*blas"tic\, a. [Gr. ? threefold + -blast + -ic.] (Biol.) Of, pertaining to, or designating, that condition of the ovum in which there are three primary germinal layers, or in which the blastoderm splits into three layers.
Wiktionary
triploblastic
a. Exhibiting triploblasty.