The Collaborative International Dictionary of English v.0.48:

Warty \Wart"y\, a.
   1. Having warts; full of warts; overgrow with warts; as, a
      warty leaf.
      [1913 Webster]

   2. Of the nature of warts; as, a warty excrescence.
      [1913 Webster]

   Warty egg (Zool.), a marine univalve shell (Ovulum
      verrucosum), having the surface covered with wartlike
      elevations.
      [1913 Webster]

WordNet (r) 3.0 (2006):

warty
    adj 1: (of skin) covered with warts or projections that resemble
           warts [syn: verrucose, warty, wartlike]