Source : WordNet®

mad apple
     n 1: hairy upright herb native to southeastern Asia but widely
          cultivated for its large glossy edible fruit commonly
          used as a vegetable [syn: {eggplant}, {aubergine}, {brinjal},
           {eggplant bush}, {garden egg}, {Solanum melongena}]
     2: egg-shaped vegetable having a shiny skin typically dark
        purple but occasionally white or yellow [syn: {eggplant},
        {aubergine}]