Subtraction /(?)/

Sub·trac·tion

Subtraction

n.
  1. The act or operation of subtracting or taking away a part.
  2. The taking of a lesser number or quantity from a greater of the same kind or denomination; an operation for finding the difference between two numbers or quantities. (Math.)
  3. The withdrawing or withholding from a person of some right to which he is entitled by law. (Law)