quinonoid

adjective

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 9 Dec. 2022.

Medical Definition

quinonoid

adjective
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)
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!


Commonly Confused Words Quiz

  • vector image of a face with thought expression
  • I went to the ______ store to buy a birthday card.
Spell It

Hear a word and type it out. How many can you get right?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ