Xanthium \Xan"thi*um\, n. [NL., fr. Gr. xa`nqion a plant used
for dyeing the hair yellow, said to be the {Xanthium
strumarium}, from xanqo`s yellow.] (Bot.)
A genus of composite plants in which the scales of the
involucre are united so as to form a kind of bur; cocklebur;
clotbur.
[1913 Webster]