Dictionary.com
Thesaurus.com

microdetector

American  
[mahy-kroh-di-tek-ter] / ˈmaɪ kroʊ dɪˌtɛk tər /

noun

  1. an instrument measuring small quantities or changes.

  2. Electricity.  an extremely sensitive galvanometer.


microdetector British  
/ ˌmaɪkrəʊdɪˈtɛktə /

noun

  1. 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

Etymology

Origin of microdetector

micro- + detector