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sweet flag

American  

noun

  1. a plant, Acorus calamus, of the arum family, having long, sword-shaped leaves and a pungent, aromatic rootstock.


sweet flag British  

noun

  1. Also called: calamus.  an aroid marsh plant, Acorus calamus, having swordlike leaves, small greenish flowers, and aromatic roots

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of sweet flag

First recorded in 1775–85