meroblast

from The Century Dictionary.

• noun In embryology, a meroblastic ovum; an egg or ovum containing food-yolk or nutritive protoplasm besides the formative or germinal protoplasm: distinguished from holoblast.

from the GNU version of the Collaborative International Dictionary of English.

• noun (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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun biology An ovum (egg) that has both germinal and nutritive parts