The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of several annual weeds of the genus Xanthium in the composite family, having small seedlike fruits enclosed within a prickly bur that clings readily to clothing or animal fur.
n. Any of the coarse composite weeds of the genus Xanthium, with a prickly fruit.
the GNU version of the Collaborative International Dictionary of English
n. A coarse, composite weed, having a rough or prickly fruit; one of several species of the genus Xanthium; -- called also clotbur.
The Century Dictionary and Cyclopedia
n. The clot-bur, Xanthium Strumarium, a weedy composite plant with close spiny involucres.
n. The agrimony, Agrimonia Eupatoria.
n. The burdock, Arctium Lappa.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. any coarse weed of the genus Xanthium having spiny burrs
n. burdock having heart-shaped leaves found in open woodland, hedgerows and rough grassland of Europe (except extreme N) and Asia Minor; sometimes cultivated for medicinal and culinary use
n. any coarse weed of the genus Xanthium having spiny burrs
Word Usage
"The light infantry will be hidden in the switchgrass, and, hopefully, avoiding the cocklebur."