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geiger counter Definition

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geiger counter
noun(Gei-ger 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
geiger counter
noun(Gei-ger counter)
geiger counter

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