a galvanometer used to measure the quantity of electricity in a current of short duration.
Origin of ballistic galvanometer
First recorded in 1875–80
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physics a type of galvanometer for measuring surges of current. After deflection the instrument returns slowly to its original reading
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