any of several North American trees of the genus Aesculus, esp A. glabra (Ohio buckeye), having erect clusters of white or red flowers and prickly fruits: family Hippocastanaceae
Also called: bugeye. See also horse chestnut
buckeye in American English
(ˈbʌkˌaɪ)
US
noun
1.
any of various trees (genus Aesculus) of the horse-chestnut family with large capsules enclosing shiny brown seeds
2.
the seed
3. [B-]; Informal
a person born or living in Ohio, called the Buckeye State
Word origin
UNRESOLVED CROSS REF + eye: from the appearance of the seed