ubiquinone
noun
ubi·qui·none yü-ˈbi-kwə-ˌnōn 
ˌyü-bə-kwi-ˈnōn
ˌyü-bə-kwi-ˈnōn : any of a group of lipid-soluble quinones that are found especially in mitochondria, have an isoprenoid side chain, and function in oxidative phosphorylation as electron-carrying coenzymes in electron transport
Example Sentences
Recent Examples on the Web Made up of five alpha- and beta-hydroxy acids and antioxidants (including retinol, ubiquinone and resveratrol), this combination will protect and smooth the complexion, as well as restore uniformity of tone. 
Felicity Carter, Forbes, 1 Aug. 2022
Felicity Carter, Forbes, 1 Aug. 2022 Word History
Etymology
blend of Latin ubique everywhere and English quinone; from its widespread occurrence in nature
First Known Use
1958, in the meaning defined above
Medical Definition
ubiquinone
noun
ubi·qui·none yü-ˈbik-wə-ˌnōn ˌyü-bi-kwi-ˈnōn
ˌyü-bi-kwi-ˈnōn : any of a group of lipid-soluble quinones that contain a long isoprenoid side chain and that function in the part of cellular respiration comprising oxidative phosphorylation as electron-carrying coenzymes in the transport of electrons from organic substrates to oxygen especially along the chain of reactions leading from the Krebs cycle
especially : coenzyme q10