Calamus (?), n.; pl. Calami (#). [L., a reed. See Halm.] 1. (Bot.) The indian cane, a plant of the Palm family. It furnishes the common rattan. See Rattan, and Dragon's blood.
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2. (Bot.) A species of Acorus (Acorus calamus), commonly called calamus, or sweet flag. The root has a pungent, aromatic taste, and is used in medicine as a stomachic; the leaves have an aromatic odor, and were formerly used instead of rushes to strew on floors.
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3. (Zoöl.) The horny basal portion of a feather; the barrel or quill.
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