Pronunciation: /ˈɡaɪɡər ˈkaʊntər/
noun A device used to detect and measure ionizing radiation, consisting of a Geiger-Muller tube connected to electronic equipment that amplifies and records the radiation pulses.
A1 A Geiger counter is a device used to detect radiation.
A2 I bought a Geiger counter to measure radiation levels in my area.
B1 The Geiger counter clicked rapidly as we approached the radioactive material.
B2 The scientist used a Geiger counter to monitor radiation levels in the laboratory.
C1 The Geiger counter's readings indicated a dangerous level of radiation in the vicinity.
C2 The Geiger counter's precision and accuracy make it a valuable tool in nuclear research.
formal The scientist used a Geiger counter to measure the levels of radiation in the area.
informal I heard that they found some radioactive material using a Geiger counter.
slang I'm going to bring my Geiger counter to check out that sketchy abandoned building.
figurative Her intuition was like a Geiger counter, always detecting the underlying tension in the room.
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