Webster’s Revised Unabridged Dictionary · 1913
Meroblast
Mer′o·blast (mĕr′ō·blăst), n. [Gr. μέρος part + -blast.] (Biol.) An ovum, as that of a mammal, only partially composed of germinal matter, that is, consisting of both a germinal portion and an albuminous or nutritive one; — opposed to holoblast.