The number that remains after subtraction; the number that when added to the subtrahend gives the minuend WordNet 3.0 & Open English WordNet

In mathematics, the result of the "remainder" operation. OmegaWiki

The amount left over after subtracting the divisor as many times as possible from the dividend without producing a negative result. If n (dividend) and d (divisor) are integers, then n can always be expressed in the form n = dq + r, where q (quotient) and r (remainder) are also integers and 0 ≤ r < d. Wiktionary