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Pronunciation: kot'i-le'don


  1. In plants, a seed leaf, the first leaf to grow from a seed.
  2. A placental unit.

See: maternal cotyledon, fetal cotyledon

[G. kotyledon, any cup-shaped hollow]

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.