单词 | hygrometer |
释义 | hygrometer[ hahy-grom-i-ter ] / haɪˈgrɒm ɪ tər / nounany instrument for measuring the water-vapor content of the atmosphere. Origin of hygrometerFirst recorded in 1660–70; hygro- + -meter Words nearby hygrometerhygristor, hygro-, hygrogram, hygrograph, hygroma, hygrometer, hygrometric, hygrometry, hygrophilous, hygrophyte, hygroscope Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for hygrometerBritish Dictionary definitions for hygrometerhygrometer / (haɪˈɡrɒmɪtə) / nounany of various instruments for measuring humidity Derived forms of hygrometerhygrometric (ˌhaɪɡrəˈmɛtrɪk), adjectivehygrometrically, adverbhygrometry, nounCollins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for hygrometerhygrometer [ hī-grŏm′ĭ-tər ] Any of several instruments that measure humidity. The most common type of hygrometer consists of two, side-by-side mercury or electronic thermometers, one of which has a dry bulb, and one of which has a bulb wrapped with a wet cotton or linen wick. As water evaporates from the wet bulb, it absorbs heat from the thermometer, driving down its temperature reading. The difference in temperature between the two thermometers is then used to calculate the relative humidity. This type of hygrometer is also called a psychrometer. Other hygrometers make use of the temperatures at which dew forms and disappears to calculate the relative humidity. Older hygrometers used the length of a strand of hair, which stretches when it absorbs moisture, to measure relative humidity. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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