The Collaborative International Dictionary of English v.0.48:

Wart \Wart\, n. [OE. werte, AS. wearte; akin to D. wrat, G.
   warze, OHG. warza, Icel. varta, Sw. v[*a]rta, Dan. vorte;
   perh. orig., a growth, and akin to E. wort; or cf. L. verruca
   wart.]
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   1. (Med.) A small, usually hard, tumor on the skin formed by
      enlargement of its vascular papillae, and thickening of
      the epidermis which covers them.
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   2. An excrescence or protuberance more or less resembling a
      true wart; specifically (Bot.), a glandular excrescence or
      hardened protuberance on plants.
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   Fig wart, Moist wart (Med.), a soft, bright red, pointed
      or tufted tumor found about the genitals, often massed
      into groups of large size. It is a variety of condyloma.
      Called also pointed wart, venereal wart. --L. A.
      Duhring.

   Wart cress (Bot.), the swine's cress. See under Swine.

   Wart snake (Zool.), any one of several species of East
      Indian colubrine snakes of the genus Acrochordus, having
      the body covered with wartlike tubercles or spinose
      scales, and lacking cephalic plates and ventral scutes.

   Wart spurge (Bot.), a kind of wartwort (Euphorbia
      Helioscopia).
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