Merriam-Webster Collegiate Dictionary - nadp

 noun  Etymology: nicotinamide adenine dinucleotide phosphate  Date: circa 1961 a coenzyme C21H28N7O17P3 of numerous dehydrogenases (as that acting on glucose-6-phosphate) that occurs especially in red blood cells and plays a role in intermediary metabolism similar to NAD but acting often on different metabolites — called also nicotinamide adenine dinucleotide phosphate, TPN, triphosphopyridine nucleotide