Source : Webster's Revised Unabridged Dictionary (1913)

Equilibrate \E`qui*li"brate\, v. t. [imp. & p. p.
   {Equilibrated}; p. pr. & vb. n. {Equilibrating}.] [L.
   aequilibratus in equilibrium; aequus equal + libra balance.
   See {Equilibrium}.]
   To balance two scales, sides, or ends; to keep even with
   equal weight on each side; to keep in equipoise. --H.
   Spenser.

Source : WordNet®

equilibrate
     v 1: bring to a chemical stasis or equilibrium
     2: bring into balance or equilibrium; "She has to balance work
        and her domestic duties"; "balance the two weights" [syn:
        {balance}, {equilibrize}, {equilibrise}] [ant: {unbalance}]