Definitions

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

  • n. The outer layer of a blastula that gives rise to the ectoderm after gastrulation.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the outer layer of a blastula that, after gastrulation, becomes the ectoderm

from the GNU version of the Collaborative International Dictionary of English

  • n. The outer layer of the blastoderm; the ectoderm. See blastoderm, delamination.

from The Century Dictionary and Cyclopedia

  • n. In botany, a name applied by Richard to a second small cotyledon which is found in wheat and some other grasses.
  • n. In embryology, the outer or external blastodermic membrane or layer of cells, forming the ectoderm or epiderm: distinguished at first from hypoblast, then from both hypoblast and mesoblast. See cut under blastocæle.

Etymologies

epi- + -blast (Wiktionary)

Examples

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