Definify.com

Webster 1913 Edition

Noun.

(Bot.)

A coarse, composite weed, having a rough or prickly fruit; one of several species of the genus

Xanthium

; – called also

clotbur

Spiny cocklebur, Xanthium spinosum.

cocklebur ‎(plural cockleburs)

Any of the coarse composite weeds of the genus Xanthium, with a prickly fruit.

any of the coarse composite weeds of the genus Xanthium, with a prickly fruit