throwers is a form of:

Summation



noun
1.
(finding of a total or sum, summing up, a total or aggregate) summation of a case សរុបសេចក្ដី
2.
(បច្ចេកទេស) ការរកចំនួនសរុប, ការសរុបសេចក្តី
ENGLISH MEANING
noun
1.
The act of summing, or forming a sum, or total amount; also, an aggregate.