Meaning of cotyledon

cot•y•le•don

Pronunciation: (kot"l-ēd'n), [key]
— n. Bot.
  1. the primary or rudimentary leaf of the embryo of seed plants.
  2. any of several lobules of the placenta.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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