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Gei·ger counter | \ ˈgī-gər- 
\
\Definition of Geiger counter
: an instrument for detecting the presence and intensity of radiations (such as cosmic rays or particles from a radioactive substance) by means of their ionizing effect on an enclosed gas which results in a pulse that is amplified and fed to a device giving a visible or audible indication
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More Definitions for Geiger counter
Geiger counter
nounEnglish Language Learners Definition of Geiger counter
: an instrument used for finding and measuring radioactivity
See the full definition for Geiger counter in the English Language Learners Dictionary
Geiger counter
nounGei·ger counter | \ ˈgī-gər- \
\Kids Definition of Geiger counter
: an instrument for detecting the presence of cosmic rays or radioactive substances
Geiger counter
nounGei·ger count·er | \ ˈgī-gər-ˌkau̇n-tər \
\Medical Definition of Geiger counter
: an instrument for detecting the presence and intensity of radiations (as cosmic rays or particles from a radioactive substance) by means of the ionizing effect on an enclosed gas which results in a pulse that is amplified and fed to a device giving a visible or audible indication
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Time Traveler for Geiger counter
The first known use of Geiger counter was in 1924
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