cal·a·mus

[kal-uh-muhs]

–noun, plural -mi [-mahy]
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

*another word brought to you by Captive Prince :o)