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An aromatic eastern North American plant (Cunila origanoides) of the mint family, having clusters of small purplish or white flowers. Also called dittany.
[So called because it grows in rocky places.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.