yüˈbikwə̇ˌnōn; ¦yübə̇kwə̇ˈn-, -ˈkwiˌn- noun
Etymology: blend of Latin ubique everywhere and English quinone ; from its occurrence in nature — more at ubiquity
: a quinone that contains a long isoprenoid side chain and that functions in the part of cellular respiration comprising oxidative phosphorylation as an electron-carrying coenzyme in the transport of electrons from organic substrates to oxygen especially along the chain of reactions leading from the Krebs cycle — called also coenzyme Q