Summation
Pronunciation : Sum*ma"tion
Part of Speech : n.
Etymology : [Cf. F. sommation. See Sum, v. t.]
Definition : Defn: The act of summing, or forming a sum, or total amount; also, an aggregate. Of this series no summation is possible to a finite intellect. De Quincey.
Source : Webster's Unabridged Dictionary, 1913