Modulus of a machine

a formula expressing the work which a given machine can perform under the conditions involved in its construction; the relation between the work done upon a machine by the moving power, and that yielded at the working points, either constantly, if its motion be uniform, or in the interval of time which it occupies in passing from any given velocity to the same velocity again, if its motion be variable; - called also the efficiency of the machine.

See also: Modulus

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.