modulus

Short definition from Wiktionary

Noun

1. 1
   The base with respect to which a congruence is computed.
2. 2
   The absolute value of a complex number.
3. 3
   A coefficient that expresses how much of a certain property is possessed by a certain substance.
4. 4
   A scalar field controlling the shape and size of extra dimensions in a compactification.
5. 5
   An operator placed between two numbers, to get the remainder of the division of those numbers.