Definition of "dog fennel" [dog fennel]

• A strong-smelling European weed (Anthemis cotula) naturalized in North America. (noun)
• A weedy plant (Eupatorium capillifolium) of the southeast United States, having pinnately divided leaves and long clusters of greenish flowers. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.