The Collaborative International Dictionary of English v.0.48:

Frostbite \Frost"bite\, n.
   The freezing, or effect of a freezing, of some part of the
   body, as the ears, fingers, toes, or nose. Severe frostbite
   can lead to the loss of fingers or toes. --Kane.

The Collaborative International Dictionary of English v.0.48:

Frostbite \Frost`bite"\, v. t.
   To expose to the effect of frost, or a frosty air; to blight
   or nip with frost.
   [1913 Webster]

         My wife up and with Mrs. Pen to walk in the fields to
         frostbite themselves.                    --Pepys.
   [1913 Webster]

WordNet (r) 3.0 (2006):

frostbite
    n 1: destruction of tissue by freezing and characterized by
         tingling, blistering and possibly gangrene [syn:
         frostbite, cryopathy]