cottonweed

[ kot-n-weed ]
/ ˈkɒt nˌwid /

noun

any of various plants having stems and leaves covered with a soft, hoary pubescence.

Origin of cottonweed

First recorded in 1555–65; cotton + weed1

British Dictionary definitions for cottonweed

cottonweed
/ (ˈkɒtənˌwiːd) /

noun

a downy perennial plant, Otanthus maritimus, of European coastal regions, having small yellow flowers surrounded by large hairy bracts: family Asteraceae (composites)
any of various similar plants