The Collaborative International Dictionary
Microampere
Microampere \Mi`cro*am`p[`e]re"\, n. [Micr- + amp[`e]re.] (Elec.) One of the smaller measures of electrical currents; the millionth part of one amp[`e]re.
Wiktionary
microampere
n. One millionth ( 10-6 ) of an ampere, abbreviated as µA.
Usage examples of "microampere".
This thing over my head is like a wireless telephone receiver, capable of detecting a current of even a quarter of a microampere.