Outrageously Funny Word Dictionary :: Involutionary

👉 The term "involutionary" is a mathematical concept that refers to a binary operation on sets, where each element of one set is related to exactly one element of the other set. This means that if you have two sets A and B, then any subset S of A will also be a subset of B, but the reverse is not necessarily true. For example, consider the set {1, 2} with its binary operation
defined as follows: (x, y) -> xy

involutionary