multiplier

noun

1. A number by which another (the multiplicand) is to be multiplied.“In the expression 5 × 7, the "5" is a multiplier.”
2. (grammar) An adjective indicating the number of times something is to be multiplied.“English multipliers include "double" and "triple".”
3. A ratio used to estimate total economic effect for a variety of economic activities.
4. Any of several devices used to enhance a signal