Bitternut

noun

1. The swamp-hickory of the United States, <em>Carya amara.</em> Its nuts are very thin-shelled, with an intensely bitter kernel.
2. The swamp hickory (<spn>Carya amara</spn>). Its thin-shelled nuts are bitter.
3. The bitternut hickory, Carya cordiformis, a common <xref>hickory</xref> tree native to the eastern <xref>United States</xref> and southeast <xref>Canada</xref>.
4. Its <xref>fruit</xref>, a bitter nut sometimes used as <xref>feed</xref> for <xref>livestock</xref>.
5. hickory of the eastern United States having a leaves with 7 or 9 leaflets and thin-shelled very bitter nuts