noun
Usage: usually capitalized R
: a Eurasian herb ( Centaurea picris ) introduced into the central United States where it has become a troublesome weed
noun
Usage: usually capitalized R
: a Eurasian herb ( Centaurea picris ) introduced into the central United States where it has become a troublesome weed
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012