from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of the blastomeres from which the ectoderm develops.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of the blastomeres from which the ectoderm forms

from the GNU version of the Collaborative International Dictionary of English

  • n. The more transparent cells, which finally become external, in many segmenting ova, as those of mammals.

from The Century Dictionary and Cyclopedia

  • n. In embryology, the less granular of the two blastomeres into which the mammalian ovum divides: also applied to a descendant of this blastomere in the first stages of development. See blastomere, entomere.


Sorry, no etymologies found.


Sorry, no example sentences found.

Wordnik is becoming a not-for-profit! Read our announcement here.


Log in or sign up to get involved in the conversation. It's quick and easy.