an instrument measuring small quantities or changes.
Electricity. an extremely sensitive galvanometer.
Origin of microdetector
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any instrument for measuring small quantities or detecting small effects, esp a sensitive galvanometer
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