noun, plural buckeyes.
any of various trees or shrubs of the genus Aesculus, as A. glabra (Ohio buckeye) having palmate leaves, gray, scaly bark, and bell-shaped greenish-yellow flowers in upright clusters: the state tree of Ohio.
the brown nut of any of these trees.
(initial capital letter) a native or inhabitant of Ohio (used as a nickname).
a butterfly, Precis lavinia, having dark-brown wings with purple or red eyespots.
stag + eye
, orig. used to designate def. 1, in allusion to the look of the seed