From Longman Dictionary of Contemporary EnglishRDARDA /ˌɑː diː ˈeɪ $ ˌɑːr-/ noun [singular] MDDFN (recommended daily allowance) the amount of substances such as vitamins that you should have every day
Examples from the Corpus
RDA• Sedentary aging increases protein needs above the current RDA.• Some studies show meeting the RDA of 8-10 milligrams daily reduces risks.• Nyerere was arguing right up to, and beyond the date of the dissolution of the RDA that ujamaa villages must govern themselves. 