Source : Webster's Revised Unabridged Dictionary (1913)

Vociferation \Vo*cif`er*a"tion\, n. [L. vociferatio: cf. F.
   vocif['e]ration.]
   The act of vociferating; violent outcry; vehement utterance
   of the voice.

         Violent gesture and vociferation naturally shake the
         hearts of the ignorant.                  --Spectator.

         Plaintive strains succeeding the vociferations of
         emotion or of pain.                      --Byron.

Source : WordNet®

vociferation
     n : a loud utterance; often in protest or opposition; "the
         speaker was interrupted by loud cries from the rear of
         the audience" [syn: {cry}, {outcry}, {call}, {yell}, {shout}]