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ground plane

noun
1.
(in perspective drawing) the theoretical horizontal plane receding from the picture plane to the horizon, beginning at the level of the base line.
2.
Electricity. a ground plate or an underground mesh of radial wires connected to a vertical antenna (ground plane antenna) that is grounded in order to provide suitable radiation characteristics.
Origin
1825-1835
1825-35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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