horse chestnut
1. any of several trees of the genus Aesculus, esp the Eurasian A. hippocastanum, having palmate leaves, erect clusters of white, pink, or red flowers, and brown shiny inedible nuts enclosed in a spiky bur: family Hippocastanaceae
2. the nut of this tree
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
horse chestnut
[′hȯrs ¦ches·nət] (botany)
Aesculus hippocastanum. An ornamental buckeye tree in the order Sapindales, usually with seven leaflets per leaf and resinous buds.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.