Horse chestnut

имя существительное а) [ботаника] конский каштан ([латинский язык] Aesculus hippocastanum; дерево) б) плод конского каштана

Большой англо-русский словарь

Horse chestnut

noun 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

Merriam-Webster's Collegiate Dictionary