chestnut

chest·nut

noun \ˈches-(ˌ)nət\

Definition of CHESTNUT

1

a : 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 cough b : the edible nut of a chestnut

2

: a callosity on the inner side of the leg of the horse