Meaning

noun any tropical Asian palm of the genus Calamus; light tough stems are a source of rattan canes

noun the aromatic root of the sweet flag used medicinally

noun perennial marsh plant having swordlike leaves and aromatic roots

originEtymology tree Latin calamuslbor. English calamus Learned borrowing from Latin calamus (“reed, cane”). Doublet of culm, haulm, helm (Etymology 4, stalk), qalam, and shawm.

Etymology from Wiktionary, CC BY-SA 3.0