Source : Webster's Revised Unabridged Dictionary (1913)

Egoistic \E`go*is"tic\, Egoistical \E`go*is"tic*al\, a.
   Pertaining to egoism; imbued with egoism or excessive
   thoughts of self; self-loving.

         Ill-natured feeling, or egoistic pleasure in making men
         miserable.                               --G. Eliot.

Source : WordNet®

egoistic
     adj : of or relating to the self [ant: {altruistic}]