aspartame

1. (organic chemistry) An artificial sweetener, the methyl ester of a dipeptide formed from aspartic acid and phenylalanine, used in many processed foods and beverages.Examples: "Though reluctant to further expose him to aspartame, I had little trouble persuading Jamie's mother to carry out a double-blind trial in order to more rigorously document her son's aberrant response to aspartame."; "Caramel colors and aspartame Phosphoric acid, potassium Natural flavors, of course caffeine And now I'm jonesin' for MSG"; "Aspartame, sold under the brand NutraSweet, was discovered accidentally by a scientist at Searle in 1965 who was testing new drugs for gastric ulcers and licked his fingers before picking up a piece of paper."Synonyms: E951 when used as a sweeteneruncountableusually