Pronunciation: (kal'u-mus),[key] —n., —pl.-miPronunciation: (-mī").[key] 1. the sweet flag, Acorus calamus. 2. its aromatic root.
3. any of various tropical Asian palms of the genus Calamus, some of which are a source of rattan.
4. the hollow base of a feather; a quill. See illus. under feather.