blastodisk


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Related to blastodisk: blastoderm

blastodisk

or

blastodisc

(blăs′tə-dĭsk′)

blastodisk

(blăs′tō-dĭsk) [″ + diskos, disk]
A flat disk of embryonic cells on the surface of the yolk of the ovum. It forms from the blastomeres.