atmometer

[ at-mom-i-ter ]
/ ætˈmɒm ɪ tər /

noun

an instrument for measuring the rate at which water evaporates.

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Also called evaporimeter.

Origin of atmometer

First recorded in 1805–15; atmo- + -meter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for atmometer

British Dictionary definitions for atmometer

atmometer
/ (ætˈmɒmɪtə) /

noun

an instrument for measuring the rate of evaporation of water into the atmosphereAlso called: evaporimeter, evaporometer

Derived forms of atmometer

atmometry, noun
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

Scientific definitions for atmometer

atmometer
[ ăt-mŏmĭ-tər ]

An instrument that measures the rate of evaporation of water into the atmosphere. Atmometers usually measure the evaporation of water from a free water surface (such as a pan of water set into the ground so that the water's surface is even with the ground's surface) or from a porous, water-saturated surface (such as filter paper placed over a graduated cylinder of water). In the first type, the difference between the ground surface and the water level is used to calculate the volume of water that has evaporated in a given period of time. In the second type, the water volume is read directly from the graduated cylinder. Also called evaporimeter
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.