/euh spahr"taym, a spahr"-, as"peuhr taym'/ , n.
a white, crystalline, odorless, slightly water-soluble noncarbohydrate powder, C 14 H 18 N 2 O 5 , synthesized from amino acids, that is 150-200 times as sweet as sugar: used as a low-calorie sugar substitute in soft drinks, table sweeteners, and other food products.
[ 1970-75; aspart ( yl phenyl ) a ( linine ) m ( ethyl ) e ( ster ), the powder's chemical name ]