QUINONYL Meaning of QUINONYL in English kwə̇ˈnōn ə l, ˈkwinəˌnil noun( -s )Etymology: quinone + -yl : the univalent radical C 6 H 3 O 2 derived from quinone by removal of one hydrogen atom Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012