1.
[syn: gumweed, gum plant, tarweed, rosinweed]
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]
WordNet (r) 3.0 (2006):
gumweed
n 1: any of various western American plants of the genus
Grindelia having resinous leaves and stems formerly used
medicinally; often poisonous to livestock [syn: gumweed,
gum plant, tarweed, rosinweed]