Macromeres
[Gr. makros - large; Gr. meros - part] Large blastomeres found in the vegetal hemisphere of eggs formed by unequal cleavage (ex. the large blastomeres of the vegetal pole of the amphibian embryo).
macromeres - large blastomeres; in the sea urchin embryo, the four relatively large cells that result from the fourth cleavage of the vegetal tier.
macromere
A large cell from the vegetative pole of a developing egg. Such a cell contains yolk and gives rise to the endoderm of the embryo.
macromere The largest size class of blastomeres in a cleaving embryo when the blastomeres differ in size from one another.
macromolecule A very large molecule, generally used in reference to carbohydrates, lipids, proteins, and nucleic acids.
blastomere exhibiting a size intermediate between a macromere and a micromere.
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 See also: Blastomere, Blastomeres, Embryo, Cleavage, Micromere
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