atmometer

atmometer [at-mom-i-ter] ExamplesWord Origin noun

1. an instrument for measuring the rate at which water evaporates.

Origin of atmometer First recorded in 1805–15; atmo- + -meter Also called evaporimeter. Examples from the Web for atmometer Historical Examples of atmometer

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

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

British Dictionary definitions for atmometer atmometer noun

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

Derived Formsatmometry, noun atmometer in Science atmometer [ăt-mŏm′ĭ-tər]

1. 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