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A blastula of the type produced by the meroblastic discoidal cleavage of a large-yolked ovum.
discoblastula/dis·co·blas·tu·la/ (dis″ko-blas´tūl-ah) the specialized blastula formed by cleavage of a fertilized telolecithal egg, consisting of a cellular cap (blastoderm) separated by the blastocoele from a floor of uncleaved yolk.discoblas´tic
Etymology: Gk, diskos, flat plate, blastos, germ
a blastula formed from the partial cleavage that occurs in a fertilized ovum containing a large amount of yolk. It develops from the blastodisc and consists of a cellular cap, or blastoderm, separated from the uncleaved yolk mass by a small cavity, the blastocele.
A modified blastula found in highly telolecithal eggs, as in birds in which the blastomeres form a cellular cap (germinal disk or blastoderm) that is separated from the yolk by a space, the blastocele.