The bottom device for a milliampere is ampere and also the prefix is milli. The prefix milli is derived from your Latin milleamperes to kiloamperes amperes to megaamperes amperes to biots amperes to abamperes amperes to statamperes amperes to coulombs per next kiloamperes to milliamperes megaamperes to milliamperes biots to milliamperes abamperes t