noun
: an acid C 10 H 14 O 4 derived from chrysanthemumic acid that occurs in the form of esters in pyrethrum flowers — compare pyrethrin
noun
: an acid C 10 H 14 O 4 derived from chrysanthemumic acid that occurs in the form of esters in pyrethrum flowers — compare pyrethrin
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012