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embryo sac

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WordReference Random House Unabridged Dictionary of American English © 2025

em′bryo sac′, [Bot.]

Botanythe megaspore of a seed-bearing plant, situated within the ovule, giving rise to the endosperm and forming the egg cell or nucleus from which the embryo plant develops after fertilization.

1870–75

'embryo sac' also found in these entries (note: many are not synonyms or translations):

endosperm - megaspore - nucellus - ovule - polar nucleus

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