ubiquinone /yo̅o̅bik″winōn/ , 1. a naturally occurring organic compound found in the lipid core of mitochondrial membranes. It functions as a carrier in the electron transport chain that produces energy. Formerly called coenzyme Q. 2. an herbal supplement used in the treatment of cardiac disease as well as several other chronic and hereditary diseases. The safety and/or effectiveness of this supplement has not been established by the FDA.
