Definitions for ubiquinone
ubiquinone, coenzyme Q(noun)
any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration
any of several quinones that have a role in cellular respiration
U.S. National Library of Medicine
A lipid-soluble benzoquinone which is involved in ELECTRON TRANSPORT in mitochondrial preparations. The compound occurs in the majority of aerobic organisms, from bacteria to higher plants and animals.