Definition of Geiger counter in English:

Geiger counter

Syllabification: Gei·ger count·er
(also Geiger-Müller counter /ˈmələr, ˈmyo͞olər/)


  • A device for measuring radioactivity by detecting and counting ionizing particles.
    More example sentences
    • The Geiger counter, a device used to detect the presence of radioactivity, works on this principle.
    • Pipes and other kinds of containers can be filled with radon gas and then checked with a Geiger counter or other detection device.
    • These arcs emit light high in the ultraviolet, as well as centimeter-wavelength sound, which together with the intense electromagnetic perturbations produced are particularly effective in activating the Geiger counters.

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Word of the day mage
Pronunciation: meɪdʒ
a magician or learned person