qui·​no·​noid kwi-ˈnō-ˌnȯid How to pronounce quinonoid (audio) ˈkwi-nə- How to pronounce quinonoid (audio)
variants or quinoid
: 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

Time Traveler
The first known use of quinonoid was in 1878

Dictionary Entries Near quinonoid

Cite this Entry

“Quinonoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quinonoid. Accessed 20 Jul. 2024.

Medical Definition


variants or quinoid
: 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)
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