ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun
or bitternut hickory
: a hickory ( Carya cordiformis ) of the eastern United States having a slender trunk, rough bark, leaves with seven or nine leaflets, and a thin-shelled very bitter nut — called also bitter hickory, bitter pignut, swamp hickory