multiplier

(arithmetic) A number by which another (the multiplicand) is to be multiplied.

(grammar) An adjective indicating the number of times something is to be multiplied.

(economics) A ratio used to estimate total economic effect for a variety of economic activities.

(physics) Any of several devices used to enhance a signal

(physics, obsolete) a coil; when Johann Schweigger in 1820 invented the electric coil, increasing the electro-magnetic field from a single wire, this invention was called a multiplier.

A multiplier onion.