Molisch test

Molisch test
    n 1: biochemical indicator of the presence of carbohydrates in a
         solution; if carbohydrates are present a violet ring is
         formed by reaction with alpha-naphthol in the presence of
         sulfuric acid [syn: {alpha-naphthol test}, {Molisch's
         test}, {Molisch test}, {Molisch reaction}]