Horse chestnut may refer to: Aesculus hippocastanum, a species of large deciduous tree native to Europe and planted around the world as an ornamental tree Aesculus glabra, a species of medium-sized deciduous tree also called Ohio buckeye native to the continental US and Canada Aesculus californica, California horse-chestnut or California buckeye, a species of large deciduous shrub or small tree Species of the genus Aesculus Horse Chestnut (horse), a South African Thoroughbred racehorse Chestnut (coat), a common coat color in horses Chestnut (horse anatomy), the callus on the leg of a horse
See also Horse-chestnut leaf miner, a moth of the lepidopteran family Gracillariidae Chestnut (disambiguation)