calamus

(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. Synonyms: sweet flag, sweet calamus, myrtle flag, flagroot, Acorus calamus.

(noun) a genus of Sparidae. Synonyms: Calamus, genus Calamus.

(noun) the hollow spine of a feather. Synonyms: quill, shaft.