Either of two deciduous trees(Carya glabra or C. ovalis) of the eastern United States,having pinnately compound leaves,male flowers grouped in catkins,and nuts with somewhat bitter kernels.

• 光滑山核桃树美国东部的两种落叶树的一种（山核桃属光滑山核桃或山核桃属甜山核桃），长有羽状的复叶、以柔苇花序聚集的雄花和核略有苦味的果实。