- Enter a word for the dictionary definition.
From The Collaborative International Dictionary of English v.0.48:
gumweed \gumweed\ n. any of various Western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock. Syn: gum plant, tarweed, rosinweed, rosin-weed. [WordNet 1.5]