Atmometer



an instrument for measuring the rate at which water evaporates.
Historical Examples

atmometer, at-mom′e-tėr, n. an instrument for measuring the rate of evaporation from a moist surface.
Chambers’s Twentieth Century Dictionary (part 1 of 4: A-D) Various

atmometer, an instrument for measuring the amount of evaporation from a moist surface in a given time.
The New Gresham Encyclopedia. Vol. 1 Part 2 Various

noun
an instrument for measuring the rate of evaporation of water into the atmosphere Also called evaporimeter, evaporometer
atmometer
(āt-mŏm’ĭ-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.

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  • Atmometry

    the science of measuring the rate at which water evaporates.



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