• synonyms


  1. an instrument for determining atmospheric humidity by the reading of two thermometers, the bulb of one being kept moist and ventilated.
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Origin of psychrometer

First recorded in 1720–30; psychro- + -meter
Related formspsy·chro·met·ric [sahy-kruh-me-trik] /ˌsaɪ krəˈmɛ trɪk/, psy·chro·met·ri·cal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for psychrometer

Historical Examples

  • The psychrometer is seen inside the shelter on the right in Fig. 2.

    Practical Exercises in Elementary Meteorology

    Robert DeCourcy Ward

  • The humidity of the air was observed both by August's psychrometer and Saussure's hygrometer.

  • The form of hygrometer most commonly met with at meteorological stations is called a psychrometer.


    Charles Fitzhugh Talman

  • To overcome this difficulty another form of psychrometer has been devised.

  • Twelve ordinary standard (psychrometer-) thermometers, divided to fifths of a degree (Centigrade).

British Dictionary definitions for psychrometer


  1. a type of hygrometer consisting of two thermometers, one of which has a dry bulb and the other a bulb that is kept moist and ventilated. The difference between the readings of the thermometers gives an indication of atmospheric humidityAlso called: wet-and-dry-bulb thermometer
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for psychrometer


"instrument to measure moisture in the atmosphere," 1749, from Latinized form of Greek psykhros "cold" + -meter.

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Online Etymology Dictionary, © 2010 Douglas Harper

psychrometer in Medicine


  1. An instrument that uses the difference in readings between thermometers specialized to measure the moisture content or relative humidity of air.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

psychrometer in Science


  1. See under hygrometer.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.