American Heritage® Dictionary of the English Language, Fourth Edition
- n. A hardy perennial herb (Acorus calamus) of the Northern Hemisphere, growing in marshy places and having grasslike leaves, minute greenish flowers borne on a thick spadix, and aromatic rhizomes. Also called calamus.
Century Dictionary and Cyclopedia
- n. An araceous plant, Acorus Calamus, with sword-shaped leaves and two-edged leaf-like scapes, from one edge of which emerges a cylindrical spadix. It has a pungent and aromatic property, especially its thick creeping rootstock, which forms the officinal calamus aromaticus. This is now sparingly used as a stomachic, also in confectionery and in kinds of distilling and brewing. Also calamus, sweet-rush, sweet sedge.
- n. a perennial wetland plant, Acorus calamus, with an aromatic medicinal root, formerly used to strew floors, also known as calamus
GNU Webster's 1913
- n. See Calamus, n., 2.
- adj. (Bot.) an endogenous plant (Acorus Calamus) having long flaglike leaves and a rootstock of a pungent aromatic taste. It is found in wet places in Europe and America. See Calamus, 2.
- n. perennial marsh plant having swordlike leaves and aromatic roots
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