- an instrument for measuring the rate at which water evaporates.
Origin of atmometer
Also called evaporimeter.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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Atmometer, an instrument for measuring the amount of evaporation from a moist surface in a given time.
Atmometer, at-mom′e-tėr, n. an instrument for measuring the rate of evaporation from a moist surface.
- an instrument for measuring the rate of evaporation of water into the atmosphereAlso called: evaporimeter, evaporometer
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
- 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
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