The Collaborative International Dictionary of English v.0.48:
Counterbalance \Coun`ter*bal"ance\ (-b?l"ans), v. t. [imp. & p.
p. Counterbalanced (-anst); p. pr. & vb. n.
To oppose with an equal weight or power; to counteract the
power or effect of; to countervail; to equiponderate; to
The remaining air was not able to counterbalance the
mercurial cylinder. --Boyle.
The study of mind is necessary to counterbalance and
correct the influence of the study of nature. --Sir W.