Source : Webster's Revised Unabridged Dictionary (1913)

Detrimental \Det`ri*men"tal\, a.
   Causing detriment; injurious; hurtful.

         Neither dangerous nor detrimental to the donor.
                                                  --Addison.

   Syn: Injurious; hurtful; prejudicial; disadvantageous;
        mischievous; pernicious.

Source : WordNet®

detrimental
     adj : (sometimes followed by `to') causing harm or injury;
           "damaging to career and reputation"; "the reporter's
           coverage resulted in prejudicial publicity for the
           defendant" [syn: {damaging}, {prejudicial}, {prejudicious}]