| bitternut | (n) hickory of the eastern United States having a leaves with 7 or 9 leaflets and thin-shelled very bitter nuts, Syn. swamp hickory, bitter pignut, bitter hickory, Carya cordiformis, bitternut hickory |
| water hickory | (n) hickory of southern United States having many narrow leaflets and rather bitter nuts, Syn. bitter pecan, water bitternut, Carya aquatica |
| Bitternut | n. (Bot.) The swamp hickory (Carya amara). Its thin-shelled nuts are bitter. [ 1913 Webster ] |