- the sweet flag, Acorus calamus.
- its aromatic root.
- any of various tropical Asian palms of the genus Calamus, some of which are a source of rattan.
- the hollow base of a feather; a quill.
- any tropical Asian palm of the genus Calamus, some species of which are a source of rattan and canes
- another name for sweet flag
- the aromatic root of the sweet flag
- the basal hollow shaft of a feather; quill
