Source : Webster's Revised Unabridged Dictionary (1913)

Calumniation \Ca*lum`ni*a"tion\
   (k[.a]*l[u^]m`n[i^]*[=a]"sh[u^]n), n.
   False accusation of crime or offense, or a malicious and
   false representation of the words or actions of another, with
   a view to injure his good name.

         The calumniation of her principal counselors. --Bacon.