The American Heritage® Dictionary of the English Language, 4th Edition
n. An instrument used to detect, measure, and determine the direction of small electric currents by means of mechanical effects produced by a current-carrying coil in a magnetic field.
n. A device used to indicate the presence and direction of a small electric current, especially used to detect a null or balanced condition in a bridge circuit.
the GNU version of the Collaborative International Dictionary of English
n. An instrument or apparatus for measuring the intensity of an electric current, usually by the deflection of a magnetic needle.
The Century Dictionary and Cyclopedia
n. An instrument for detecting the existence and determining the strength and direction of an electric current.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. meter for detecting or comparing or measuring small electric currents
Word Usage
"In electrocardiography the string galvanometer is the most reliable tool."