NADPH Meaning of NADPH in English Pronunciation: ˌ en-( ˌ ) ā -( ˌ )d ē -( ˌ )p ē - ' ā ch Function: noun Etymology: NADP + H, symbol for hydrogen Date: 1964: the reduced form of NADP Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012