单词	Geiger counter
释义	Geiger counter noun Gei·​ger counter ˈgī-gər-  : 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 Word History Etymology Hans Geiger †1945 German physicist First Known Use 1924, in the meaning defined above Kids Definition Geiger counter noun Gei·​ger counter ˈgī-gər-  : an instrument for detecting the presence of cosmic rays or radioactive substances Medical Definition Geiger counter noun Gei·​ger count·​er ˈgī-gər-ˌkau̇n-tər  : 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
随便看	pretend to (something) pretend to something pretendant pretendants pretended pretendedly pretender pretenderism pretenders pretendest pretending pretends pretense pretensed pretenseless pretenses pretension pretensioned pretensioner pretensioners pretensioning pretensionless pretensions pretensive pretentious

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