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hygrometer [hygrometers]▼(instrument that measures humidity)noun[UK: haɪ.ˈɡrɑː.mə.tə(r)] [US: haɪ.ˈɡrɑː.mə.tər]
hygroscope▼(instrument that indicates changes in atmospheric humidity)noun[UK: hˈaɪɡrəskˌəʊp] [US: hˈaɪɡrəskˌoʊp]
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