Dictionary

horse chestnut

noun

: a tree with flowers that grow in large bunches and large brown seeds; also : the seed of a horse chestnut tree

Full Definition of HORSE CHESTNUT

1
:  a large tree (Aesculus hippocastanum of the family Hippocastanaceae, the horse-chestnut family) of southeastern Europe that has palmate leaves and erect conical clusters of showy flowers and is widely cultivated as an ornamental and shade tree and naturalized as an escape; also :  buckeye
2
:  the large glossy brown seed of a horse chestnut

First Known Use of HORSE CHESTNUT

1597
May 27, 2015
riot act Hear it
a vigorous reprimand or warning
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears