from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A unit of electric current equal to one millionth of an ampere.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One millionth ( 10-6 ) of an ampere, abbreviated as µA.
from the GNU version of the Collaborative International Dictionary of English
- n. One of the smaller measures of electrical currents; the millionth part of one ampère.
from The Century Dictionary and Cyclopedia
- n. A unit employed in the measurement of very small electric currents; one millionth of an ampere or 1 × 10- c. g. s. units of current.
micro- + ampere (Wiktionary)