The operation or function that returns the remainder of one number divided by another.

Given a specified modulus of.

“21 and 84 are congruent to each other modulo 9, since both numbers leave the same remainder, 3, when divided by 9.”

Except for differences accounted for by.

“"A is the same as B modulo C" means A is the same as B except for differences accounted for by C.”

(extended use) With due allowance for (a specified exception or particular detail).

“All mammals, modulo the monotremes, give birth to live young.”