Толковый словарь английского языка - modulus

noun (plural moduli) Etymology: New Latin, from Latin, small measure Date: 1753 1. the factor by which a logarithm of a number to one base is multiplied to obtain the logarithm of the number to a new base, absolute value 2, c. the number (as a positive integer) or other mathematical entity (as a polynomial) in a congruence that divides the difference of the two congruent members without leaving a remainder, the number of different numbers used in a system of modular arithmetic, a constant or coefficient that expresses usually numerically the degree to which a body or substance possesses a particular property (as elasticity)