ubi·​qui·​none | \ yü-ˈbi-kwə-ˌnōn, ˌyü-bə-kwi-ˈnōn \

Definition of ubiquinone

: 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

First Known Use of ubiquinone

1958, in the meaning defined above

History and Etymology for ubiquinone

blend of Latin ubique everywhere and English quinone; from its widespread occurrence in nature

Keep scrolling for more

Learn More about ubiquinone

Share ubiquinone

Statistics for ubiquinone

Look-up Popularity

Time Traveler for ubiquinone

The first known use of ubiquinone was in 1958

See more words from the same year

Keep scrolling for more

More Definitions for ubiquinone


ubi·​qui·​none | \ yü-ˈbik-wə-ˌnōn, ˌyü-bi-kwi-ˈnōn \

Medical Definition of ubiquinone

: 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

More from Merriam-Webster on ubiquinone

Britannica.com: Encyclopedia article about ubiquinone

Comments on ubiquinone

What made you want to look up ubiquinone? Please tell us where you read or heard it (including the quote, if possible).


tremendous in size, volume, or degree

Get Word of the Day daily email!

Test Your Vocabulary

Homophone Quiz

  • three-bears-two-of-them-look-like-theyre-whispering-to-a-third-bear-who-looks-chuffed-to-be-the-center-of-attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

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