Dictionary
recommend'ed di'etary allow'ance
Nutrition.
the amount of an essential nutrient, as a vitamin or mineral, that has been established by the Food and Nutrition Board of the National Academy of Sciences as adequate to meet the average daily nutritional needs of most healthy persons according to age group and sex.
Abbr.: RDA Cf.
U.S. RDA Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.