n.
A quinone compound that serves as an electron carrier between flavoproteins and in cellular respiration.
[Latin ubī(que), everywhere; see ubiquity + QUINONE.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
