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Related to Horse-chestnut: Aesculus hippocastanum


n.1.(Bot.) The large nutlike seed of a species of Æsculus (Æsculus Hippocastanum), formerly ground, and fed to horses, whence the name. The seed is not considered edible by humans.
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.
References in classic literature ?
Staring up into the green gloom of the horse-chestnut trees above him, he dreamed dreams of all sorts, and was just imagining himself tossing on the ocean in a voyage round the world, when the sound of voices brought him ashore in a flash.
Glistening sidewalks, with little pools of rain, here and there, along their unequal surface; umbrellas displayed ostentatiously in the shop-windows, as if the life of trade had concentrated itself in that one article; wet leaves of the, horse-chestnut or elm-trees, torn off untimely by the blast and scattered along the public way; an unsightly, accumulation of mud in the middle of the street, which perversely grew the more unclean for its long and laborious washing,--these were the more definable points of a very sombre picture.
Before I left my bed in the morning, little Adele came running in to tell me that the great horse-chestnut at the bottom of the orchard had been struck by lightning in the night, and half of it split away.
There is a nut abounding in the valley, called by the Typees 'armor', closely resembling our common horse-chestnut.