noun
: a coarse perennial ragweed ( Ambrosia psilostachya ) that resembles common ragweed but has perennial creeping roots — called also perennial ragweed
noun
: a coarse perennial ragweed ( Ambrosia psilostachya ) that resembles common ragweed but has perennial creeping roots — called also perennial ragweed
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012