cotyledon

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See also: cotylédon

English[edit]

English Wikipedia has an article on:
Wikipedia
Structure of the placenta, with a placental cotyledon marked in rectangle.
Mimosa pudica seedling with two cotyledons and the first "true" leaf with six leaflets.

Etymology[edit]

From Latin cotylēdōn, from Ancient Greek κοτυληδών (kotulēdṓn, cup-shaped cavity), from κοτύλη (kotúlē, cup).

Pronunciation[edit]

Noun[edit]

cotyledon (plural cotyledons)

  1. (physiology) Each of the patches of villi on the foetal chorion in the placenta of ruminants and some other mammals.
    • 1997, Roy Porter, The Greatest Benefit to Mankind, Folio Society 2016, p. 72:
      Forced to apply animal findings to humans, his human womb also had cotyledons like a dog's.
  2. (botany) The leaf of the embryo of a seed-bearing plant; after germination it becomes the first leaves of the seedling.

Synonyms[edit]

(botany): seed leaf

Derived terms[edit]

Translations[edit]