Acorus
A'CORUS, noun [Latin from Gr..]
1. Aromatic Calamus, sweet flag, or sweet rush.
2. In natural history, blue coral, which grows in the form of a tree, on a rocky bottom, in some parts of the African seas. it is brought from the Camarones and Benin.
3. In medicine, this name is sometimes given to the great galangal.