Hygroscope meaning

hīgrə-skōp
An instrument that indicates changes in atmospheric humidity.
noun
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An instrument that indicates, without actually measuring, changes in atmospheric humidity, as by swelling or color change.
noun
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An instrument that records changes in atmospheric humidity. Unlike a hygrometer, a hygroscope only indicates a change in relative humidity, without measuring the magnitude of the change.
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Origin of hygroscope

  • hygro- +‎ -scope

    From Wiktionary