mad-apple

from The Century Dictionary.

• noun Same as egg-plant.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) The eggplant bush (Solanum melongena). See eggplant.
• noun The fruit of the eggplant bush, a large egg-shaped vegetable having a shiny skin typically dark purple but occasionally white or yellow.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun botany, obsolete eggplant

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun hairy upright herb native to southeastern Asia but widely cultivated for its large glossy edible fruit commonly used as a vegetable
• noun egg-shaped vegetable having a shiny skin typically dark purple but occasionally white or yellow