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

  • n. Botany The central portion of an ovule in which the embryo sac develops; the megasporangium.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The tissue which surrounds and protects the embryo and lies inside of the integuments.

from the GNU version of the Collaborative International Dictionary of English

  • n. See nucleus, 3 (a).

from The Century Dictionary and Cyclopedia

  • In botany, the body of the ovule containing the embryo-sac; the nucleus of the ovule.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. central part of a plant ovule; contains the embryo sac


New Latin, from nux, nuc-, nut.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From French nucelle ("little nut"), from Latin nux ("nut"). (Wiktionary)



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