cotyledon definition

  • noun:
    • Botany A leaf regarding the embryo of a seed plant, which upon germination either continues to be within the seed or emerges, enlarges, and becomes green. Also referred to as seed leaf.
    • Anatomy one of several lobules constituting the uterine region of the mammalian placenta, consisting mainly of a rounded size of villi.
    • The leaf regarding the embryo of a seed-bearing plant; after germination it becomes the very first leaves for the seedling.
    • Botany A leaf associated with the embryo of a seed plant, which upon germination either stays inside seed or emerges, enlarges, and becomes green. Also called seed leaf.
    • Anatomy One of the lobules constituting the uterine side of the mammalian placenta, consisting mainly of a rounded size of villi.
    • The leaf associated with embryo of a seed-bearing plant; after germination it becomes the initial leaves regarding the seedling.

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