psychrometer

1 of 2

noun (1)

: a hygrometer consisting essentially of two similar thermometers with the bulb of one being kept wet so that the cooling that results from evaporation makes it register a lower temperature than the dry one and with the difference between the readings constituting a measure of the dryness of the atmosphere

psychrometry

2 of 2

noun (2)

plural -es
1
: the use of the psychrometer
2
: a science dealing with the physical laws governing air and water mixture compare hygrometry

Examples of psychrometer in a Sentence

Recent Examples on the Web
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Noun
Bundled up from head to toe, George had to venture out in some of the most extreme conditions ever recorded holding a sling psychrometer in her hand, which is the technique the observatory has used to measure weather conditions since 1932. — Jennifer Gray, CNN, 6 Feb. 2023 More recently, a device called a sling psychrometer can be used to calculate the wet bulb globe temperature. — Tori B. Powell, CBS News, 12 Aug. 2022 During Friday’s practice at Kentucky Country Day, student managers measured the field’s heat index every 15 minutes using a psychrometer. — Dominique Yates, The Courier-Journal, 19 July 2019

Word History

Etymology

Noun (1)

International Scientific Vocabulary

Noun (2)

International Scientific Vocabulary psychrometer + -y

First Known Use

Noun (1)

1728, in the meaning defined above

Time Traveler
The first known use of psychrometer was in 1728

Browse Nearby Words

Cite this Entry

“Psychrometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/psychrometer. Accessed 6 Oct. 2026.

Kids Definition

psychrometer

noun
: an instrument for measuring water vapor

Medical Definition

psychrometer

noun
: a hygrometer consisting essentially of two similar thermometers with the bulb of one being kept wet so that the cooling that results from evaporation makes it register a lower temperature than the dry one and with the difference between the readings constituting a measure of the dryness of the atmosphere
psychrometry noun
plural psychrometries

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