Definition of Nad

NAD can refer to:

• Nicotinamide adenine dinucleotide, a coenzyme used in glycolysis
• National Appeals Division, an agency within the United States Department of Agriculture
• National Association of the Deaf, a non-profit advocacy organization
• NAD Electronics, a Canadian audio equipment manufacturer
• Namibian dollar, the currency of the African nation of Namibia
• North American Datum, a series of geographic coordinate systems
• New Animal Drug, a regulatory category under section 512 of the United States Food, Drug and Cosmetics Act.
• Native Americans at Dartmouth College, one of the Dartmouth College student groups.
• NAD+, the oxidized form of NADH
• New Age Diamonds, a company producing cultured / synthetic diamonds of new age\
• National Advertising Division

Nicotinamide adenine dinucleotide (NAD⁺ or in older notation DPN⁺) is an important coenzyme found in cells. It plays key roles as a carrier of electrons and a participant in metabolic redox reactions, as well as in cell signaling. There are two forms of this coenzyme in cells, NAD⁺ and the phosphorylated form NADP⁺. These two related coenzymes have similar chemistry, but perform different roles in metabolism. When both coenzymes are being discussed, they are referred to collectively as NAD(P)⁺.