[mahy-kroh-am-peer, -am-peer]
noun Electricity.
a unit of electric current, equal to one millionth of an ampere. Symbol: μA

1900–05; micro- + ampere

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
When the probe contacts the water surface, it completes a microampere circuit through the conductive liquid to a ground return.
Such antennas produce about a microampere of current.
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