coenzyme

/koʊˈɛnˌzaɪm/

Definitions of coenzyme

1. noun

   a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes
   types:

   cocarboxylase, thiamine pyrophosphate

   a coenzyme important in respiration in the Krebs cycle

   coenzyme A

   a coenzyme present in all living cells; essential to metabolism of carbohydrates and fats and some amino acids

   NAD, nicotinamide adenine dinucleotide

   a coenzyme present in most living cells and derived from the B vitamin nicotinic acid; serves as a reductant in various metabolic processes

   NADP, nicotinamide adenine dinucleotide phosphate

   a coenzyme similar to NAD and present in most living cells but serves as a reductant in different metabolic processes

   triphosphopyridine nucleotide

   a coenzyme of several enzymes

   coenzyme Q, ubiquinone

   any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration

   type of:

   molecule

   (physics and chemistry) the simplest structural unit of an element or compound