Source : Webster's Revised Unabridged Dictionary (1913)

Disconcertion \Dis`con*cer"tion\, n.
   The act of disconcerting, or state of being disconcerted;
   discomposure; perturbation. [R.] --State Trials (1794).

Source : WordNet®

disconcertion
     n : anxious embarrassment [syn: {discomfiture}, {discomposure},
         {disconcertment}]