micromere definition

  • noun:
    • A very small blastomere.
    • An unusually little blastomere formed by unequal cleavage of a fertilized ovum
    • among smaller cells, or blastomeres, caused by the whole segmentation of a telolecithal ovum.
    • small one of two masses or moieties into that the vitellus of a lamelli branch, as a fresh-water mussel, divides; the so-called “animal cellular” of Rabl, which further subdivides into blastomeres. See macromere.
    • one of many little blastomeres, or cells, which derive from early cleavage of the egg: opposed to macromere or megamere.

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