Meaning of horse chestnut

horse' chest"nut

Pronunciation: [key]
  1. a tree, Aesculus hippocastanum, native to the Old World, having digitate leaves and upright clusters of white flowers.
  2. the shiny, brown, nutlike seed of this tree or of other trees of the genus Aesculus.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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