Definitions

from The Century Dictionary.

  • noun An aggregation of formative protoplasm at one pole of the fertilized ovum.

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

  • noun a disc-shaped layer of cells on the surface of the yolk mass of an egg (such as that of a bird) which develops to form the embryo.

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

  • noun Alternative form of blastodisk.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a layer of cells on the inside of the blastula

Etymologies

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Examples

  • If the egg is not fertile the white mark will not be perfectly round and may be smaller (called a blastodisc).

    TreeHugger 2010

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