The base device for a milliampere is ampere plus the prefix is milli. The prefix milli is derived within the Latin milleamperes to kiloamperes amperes to megaamperes amperes to biots amperes to abamperes amperes to statamperes amperes to coulombs per 2nd kiloamperes to milliamperes megaamperes to milliamperes biots to milliamperes abamperes to mill