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Webster 1828 Edition
Acorus
A'CORUS
,Noun.
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.