counterbalanced, counter-balanced, counterpoised

from The Collaborative International Dictionary of English v.0.48
balanced \bal"anced\ adj.
   being in a state of proper balance or equilibrium; --
   opposite of {unbalanced}. the carefully balanced seesaw a
   properly balanced symphony orchestra a balanced assessment of
   intellectual and cultural history a balanced blend of
   whiskeys the educated man shows a balanced development of all
   his powers [Narrower terms: {counterbalanced,
   counter-balanced, counterpoised}; {well-balanced}; {poised}]
   [Related terms: stable --- (maintaining equilibrium)]
   [WordNet 1.5]
    

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