from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A very small blastomere.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An unusually small blastomere formed by unequal cleavage of a fertilized ovum
from the GNU version of the Collaborative International Dictionary of English
- n. One of the smaller cells, or blastomeres, resulting from the complete segmentation of a telolecithal ovum.
from The Century Dictionary and Cyclopedia
- n. The smaller one of two masses or moieties into which the vitellus of a lamelli branch, as a fresh-water mussel, divides; the so-called “animal cell” of Rabl, which further subdivides into blastomeres. See macromere.
- n. One of the small blastomeres, or cells, which result from the early cleavage of the egg: opposed to macromere or megamere.
micro- + (blasto)mere.(American Heritage® Dictionary of the English Language, Fourth Edition)