Russian thistle

noun

a saltwort, Salsola kali tenuifolia, that has narrow, spinelike leaves, a troublesome weed in the central and western U.S.

Origin of Russian thistle

An Americanism dating back to 1890–95

Also called Russian tumbleweed.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018