The Collaborative International Dictionary of English v.0.48:

Verruca \Ver*ru"ca\, n.; pl. Verrucae. [L. Cf. Verrugas.]
   1. (Med.) A wart.
      [Webster 1913 Suppl.]

   2. (Zool.) A wartlike elevation or roughness.
      [Webster 1913 Suppl.]