Source : Webster's Revised Unabridged Dictionary (1913)

Equipoise \E"qui*poise\, n. [Equi- + poise.]
   1. Equality of weight or force; hence, equilibrium; a state
      in which the two ends or sides of a thing are balanced,
      and hence equal; state of being equally balanced; -- said
      of moral, political, or social interests or forces.

            The means of preserving the equipoise and the
            tranquillity of the commonwealth.     --Burke.

            Our little lives are kept in equipoise By opposite
            attractions and desires.              --Longfellow.

   2. Counterpoise.

            The equipoise to the clergy being removed. --Buckle.

Source : WordNet®

equipoise
     n : equality of distribution [syn: {balance}, {equilibrium}, {counterbalance}]