Definition of ammeter noun from the Oxford Advanced Learner's Dictionary

 

ammeter

 noun
noun
BrE BrE//ˈæmiːtə(r)//
 
; NAmE NAmE//ˈæmiːtər//
 
Electronics
 
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an instrument for measuring the strength of an electric current See related entries: Electronics Word Origin late 19th cent.: from ampere (see amp) + -meter (see meter).
See the Oxford Advanced American Dictionary entry: ammeter