calamus
英
美
n. 羽毛管；羽根，翮; 菖蒲，白菖，白藤属 （Calamus）植物
英英释义
noun
- the hollow spine of a feather
- perennial marsh plant having swordlike leaves and aromatic roots
- the aromatic root of the sweet flag used medicinally
- any tropical Asian palm of the genus Calamus