Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
any of a genus (Galeopsis) of European plants of the mint family; esp., a common prickly weed (G. tetrahit) now found in the U.S.
Used by arrangement with John Wiley & Sons, Inc.
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Any of various Eurasian plants of the genus Galeopsis, having bristly stems and white or reddish flowers with two lips.