from The American Heritage® Dictionary of the English Language, 4th 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a perennial wetland plant, Acorus calamus, with an aromatic medicinal root, formerly used to strew floors, also known as calamus

from the GNU version of the Collaborative International Dictionary of English

  • adj. 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. See Calamus, n., 2.

from The 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. perennial marsh plant having swordlike leaves and aromatic roots


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