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from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Material derived from the Golgi apparatus from which the acrosome develops during spermatogenesis.
  • n. (archaic) A type of embryonic cell forming a layer external to the mesoblast.

from The Century Dictionary and Cyclopedia

  • n. In embryology, that portion of the embryonic germ-layers in vertebrates which gives rise to the blood and connective tissue; the mesenchyme.


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