Medical Definition of chestnut
1a: a tree or shrub of the genus Castanea (C. dentata) that is found in eastern North America and the leaf of which was formerly used to prepare an infusion for the treatment of whooping coughb: the edible nut of a chestnut
2: a callosity on the inner side of the leg of the horse
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Dictionary: Definition of "chestnut" Thesaurus: All synonyms and antonyms for "chestnut" Spanish Central: Translation of "chestnut" Nglish: Translation of "chestnut" for Spanish speakers Britannica English: Translation of "chestnut" for Arabic speakers Britannica.com: Encyclopedia article about "chestnut"
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