Definition of "ammeter" [am•me•ter]

• An instrument that measures electric current in amperes. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The ammeter is a dial that measures how many amps are consumed, helping the driver control energy efficiency for different driving situations."
• "He shot another quick glance at the ship, corrected slightly with his feet, and back to the dial of the ammeter."
• "The left number on the top box — the watt-ammeter — indicates the energy consumption of the TV, about 177 watts."