noun
Geiger-Müller counter
A radiation detection instrument; the full technical term. Often shortened to ガイガーカウンター in everyday use.
実験室にはガイガーミュラー計数管が設置されている。
A Geiger-Müller counter is installed in the laboratory.
Common abbreviation for Geiger counter; more frequently used in general contexts than the full term ガイガーミュラー計数管.
From German 'Geiger-Müller' plus Japanese 計数管 (counter tube). The German name honors physicists Hans Geiger and Walther Müller.