a counterbalancing weight.
any equal and opposing power or force.
the state of being in equilibrium; balance.
Radio. a network of wires or other conductors connected to the base of an antenna, used as a substitute for the ground connection.
verb (used with object), counterpoised, counterpoising.
to balance by an opposing weight; counteract by an opposing force.
to bring into equilibrium.
Archaic. to weigh (one thing) against something else; consider carefully.

1375–1425; counter- + poise1; replacing late Middle English countrepeis < Anglo-French, equivalent to Old French contrepois Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
counterpoise (ˈkaʊntəˌpɔɪz)
1.  a force, influence, etc, that counterbalances another
2.  a state of balance; equilibrium
3.  a weight that balances another
4.  a radial array of metallic wires, rods, or tubes arranged horizontally around the base of a vertical aerial to increase its transmitting efficiency
5.  to oppose with something of equal effect, weight, or force; offset
6.  to bring into equilibrium
7.  archaic to consider (one thing) carefully in relation to another

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

early 15c., from O.Fr. countrepeis, from contre- "against" (see contra) + peis, from L. pensum "weight," noun use of neuter pp. of pendere "to weigh" (see pendant).
Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Britannica


in electronics, portion of an antenna system that is composed of wires or other types of conductor arranged in a circular pattern at the base of the antenna at a certain distance above ground. Insulated from the ground, it forms the lower system of antenna conductors. It is used in places where it is difficult to obtain a good ground (e.g., where there is extremely rocky soil). A combination of counterpoise and buried-wire grounds is also possible

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The scene of the poem-a landscape-is painted with a serenity that acts as a counterpoise to the emotions of loss.
Furnish and install copper ground rods, counterpoise, and grounding cables.
During the installation of the fence grounding system, the counterpoise was placed inside the fence.
Structural counterpoise that brings about a desired balance under static or dynamic conditions.
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