- an instrument for measuring current in amperes.
Origin of ammeter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ammeter
Ammeter should show three to five amperes charge with lamps burning.
Each circuit is provided with a separate rheostat and ammeter.
A relay snapped, and instantly the ammeter jumped to read 4500 amperes.Islands of Space
John W Campbell
They were all up to capacity, save the ammeter from the coils.Invaders from the Infinite
John Wood Campbell
The voltmeter cost $7, and the ammeter $10; and the switches and fuses could be had for $5.Electricity for the farm
Frederick Irving Anderson
- an instrument for measuring an electric current in amperes
C19: am (pere) + -meter
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for ammeter
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.