The Collaborative International Dictionary of English v.0.48:

Self-sacrificing \Self`-sac"ri*fi`cing\, a.
   Yielding up one's own interest, feelings, etc; sacrificing
   one's self.
   [1913 Webster]

WordNet (r) 3.0 (2006):

self-sacrificing
    adj 1: willing to deprive yourself [syn: self-denying, self-
           giving, self-sacrificing]