frost·bite 
(frôstbīt′, frŏst-)
(frôstbīt′, frŏst-)n.
Injury or destruction of skin and underlying tissue, most often that of the nose, ears, fingers, or toes, resulting from prolonged exposure to freezing or subfreezing temperatures.
tr.v. frost·bit (-bĭt′), frost·bit·ten (-bĭt′n), frost·bit·ing, frost·bites
To injure or damage by freezing.