kwə̇ˈnōˌnȯid, ˈkwinəˌnȯid adjective
or quin·oid ˈkwiˌnȯid
Etymology: quinonoid from quinone + -oid; quinoid International Scientific Vocabulary quin- + -oid
: resembling quinone ; especially : having a structure characterized by a benzene nucleus containing two instead of three double bonds within the nucleus and two external double bonds attached to the nucleus either at ortho or para positions (as in the two carbonyl groups of quinones)
anthraquinone and related quinonoid dyes