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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the science of measuring the rate at which water evaporates.
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