Source : Webster's Revised Unabridged Dictionary (1913)

Incurious \In*cu"ri*ous\, a. [L. incuriosus: cf. F. incurieux.
   See {In-} not, and {Curious}.]
   Not curious or inquisitive; without care for or interest in;
   inattentive; careless; negligent; heedless.

         Carelessnesses and incurious deportments toward their
         children.                                --Jer. Taylor.

Source : WordNet®

incurious
     adj : showing absence of intellectual inquisitiveness or natural
           curiosity; "strangely incurious about the cause of the
           political upheaval surrounding them" [ant: {curious}]