microammeter

[ mahy-kroh-am-mee-ter ]
/ ˌmaɪ kroʊˈæm mi tər /

noun

an instrument for measuring extremely small electric currents, calibrated in microamperes.

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Origin of microammeter

First recorded in 1925–30; micro- + ammeter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020