Cotyledon Definition

kŏtl-ēdn
cotyledons
noun
cotyledons
The first single leaf or one of the first pair of leaves produced by the embryo of a flowering plant, or any of various similar structures found in conifers.
Webster's New World
One of the lobules constituting the uterine side of the mammalian placenta, consisting mainly of a rounded mass of villi.
American Heritage Medicine
The definition of a cotyledon is the first leaf or set of leaves that sprout from a seed.
An example of a cotyledon is the first two leaves that sprout from a sunflower seed.
YourDictionary
Synonyms:
seed-leaf

Other Word Forms of Cotyledon

Noun

Singular:
cotyledon
Plural:
cotyledons

Origin of Cotyledon

  • From Latin cotyledon, from Ancient Greek κοτυληδών (kotulēdōn, “cup-shaped cavity”), from κοτύλη (kotulē, “cup”).

    From Wiktionary

  • Latin cotylēdōn navelwort from Greek kotulēdōn from kotulē hollow object

    From American Heritage Dictionary of the English Language, 5th Edition

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