/an'tee keuh myooh"teuh tiv, -kom"yeuh tay'-, an'tuy-/ , adj. Math.
1. (of a binary operation) having the property that one term operating on a second is equal to the negative of the second operating on the first, as ab = -ba.
2. (of two matrices) defined by an anticommutative operation.
[ ANTI- + COMMUTATIVE ]