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The Collaborative International Dictionary of English v.0.48 (gcide)

Horse-chestnut \Horse`-chest"nut\, Horsechestnut
\Horse`chest"nut\, n.
1. (Bot.) The large nutlike seed of a species of {Aesculus}
({Aesculus Hippocastanum}), formerly ground, and fed to
horses, whence the name. The seed is not considered edible
by humans. [WordNet sense 2]
[1913 Webster WordNet 1.5]

2. (Bot.) The tree itself ({Aesculus hippocastanum}), which
was brought from Constantinople in the beginning of the
sixteenth century, and is now common in the temperate
zones of both hemispheres; it has palmate leaves and large
clusters of white to red flowers followed by brown shiny
inedible seeds. The native American species is also called
{buckeye} and {conker}. [WordNet sense 1]
[1913 Webster WordNet 1.5]


Buckeye \Buck"eye`\ (b[u^]k"[imac]`), n.
1. (Bot.) A name given to several American trees and shrubs
of the same genus ({[AE]sculus}) as the horse chestnut.
[1913 Webster]

{The Ohio buckeye}, or {Fetid buckeye}, is {Aesculus glabra}.


{Red buckeye} is {Aesculus Pavia}.

{Small buckeye} is {Aesculus paviflora}.

{Sweet buckeye}, or {Yellow buckeye}, is {Aesculus flava}.
[1913 Webster]

2. A cant name for a native or resident of Ohio. [U.S.]
[1913 Webster]

{Buckeye State}, Ohio; -- so called because buckeye trees
abound there.
[1913 Webster]