As nouns the difference between millimeter and ammeter
is that millimeter is an alternative spelling of from=US|lang=en while ammeter is a device that measures the magnitude of an electric current, especially one calibrated in amperes.
ammeter
Alternative forms
* ammetre (nonstandard)
Noun
(
en noun)
A device that measures the magnitude of an electric current, especially one calibrated in amperes.
Related terms
* voltammeter
Anagrams
*