horse chestnut definition by Webster's New World
- any of a genus (Aesculus) of shrubs and trees of the horse-chestnut family, including buckeyes; esp., a tree (A. hippocastanum) with large, palmately compound leaves, clusters of white flowers, and glossy, brown seeds
- a seed of this tree
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
designating a family (Hippocastanaceae, order Sapindales) of dicotyledonous trees, including the horse chestnuts
Origin: translated, translation of obsolete botanical Classical Latin Castanea equina: reason for name uncertain
horse chestnut definition by American Heritage Dictionary
- Any of several trees of the genus Aesculus, especially the European species A. hippocastanum, having opposite, palmately compound leaves, erect clusters of white flowers tinged with red or yellow, and spiny or smooth capsules containing large shiny brown seeds.
- The seed of any of these plants.
Origin: Perhaps from a former use to cure cough in horses.