saw palmetto
noun
1- a small palm with fan-shaped leaves that have sharply toothed stalks, native to the south-eastern US锯齿棕（产于美国东南部的扇叶刺柄矮棕榈树）。
1.1
- Several species in the family Palmae, in particular Serenoa repens.棕榈科, 数种, 尤指锯齿棕。