horse chestnutyoudaoicibaDictYouDict
"A deciduous tree with large leaves of five leaflets, conspicuous sticky winter buds, and upright conical clusters of white, pink, or red flowers. It bears nuts (conkers) enclosed in a fleshy case", Late 16th century: translating (now obsolete) botanical Latin Castanea equina; its fruit is said to have been an Eastern remedy for chest diseases in horses.