The Collaborative International Dictionary of English v.0.48:
Frost-bitten \Frost`-bit"ten\, p. a. Nipped, withered, or injured, by frost or freezing. [1913 Webster]WordNet (r) 3.0 (2006):
frostbitten adj 1: injured by freezing or partial freezing; "frostbitten fingers"; "frostbitten grapes unsalable as fresh fruit"