[ at-mom-i-ter ]

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

Origin of atmometer

First recorded in 1805–15; atmo- + -meter

Words Nearby atmometer Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use atmometer in a sentence

British Dictionary definitions for atmometer


/ (ætˈmɒmɪtə) /

  1. an instrument for measuring the rate of evaporation of water into the atmosphere: Also 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


[ ăt-mŏmĭ-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

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.