quinonoid

adjective

qui·​no·​noid kwi-ˈnō-ˌnȯid  ˈkwi-nə- 

variants or quinoid

ˈkwi-ˌnȯid 

: resembling quinone especially in having a 6-membered carbon ring containing two double bonds

Word History

First Known Use

1878, in the meaning defined above

Medical Definition

quinonoid

adjective

qui·​no·​noid kwi-ˈnō-ˌnȯid  ˈkwin-ə-ˌnȯid 

variants or quinoid

ˈkwi-ˌnȯid 

: 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)