Definition:Equilibrant

Definition
Let $\mathbf F_1, \mathbf F_2, \ldots, \mathbf F_n$ be a set of $n$ forces acting on a particle $B$ at a point $P$ in space.

The equilibrant of $\mathbf F_1, \mathbf F_2, \ldots, \mathbf F_n$ is defined as the force which is needed to prevent $B$ from moving.

Also see

 * Magnitude and Direction of Equilibrant