counterpoise

[koun-ter-poiz]
noun
1.
a counterbalancing weight.
2.
any equal and opposing power or force.
3.
the state of being in equilibrium; balance.
4.
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.
5.
to balance by an opposing weight; counteract by an opposing force.
6.
to bring into equilibrium.
7.
Archaic. to weigh (one thing) against something else; consider carefully.

Origin:
1375–1425; counter- + poise1; replacing late Middle English countrepeis < Anglo-French, equivalent to Old French contrepois

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
counterpoise (ˈkaʊntəˌpɔɪz)
 
n
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
 
vb
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
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Etymonline
Word Origin & History

counterpoise
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
Encyclopedia

counterpoise

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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