hop clover definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of a group of clovers with yellow flowers resembling hops when dry, esp. a species (Trifolium agrarium) commonly found in NE U.S.
hop clover definition by American Heritage Dictionary
A Eurasian clover (Trifolium agrarium) or one of its relatives, having small yellow flower heads that resemble hops when withered.