atmidometer

from The Century Dictionary.

• noun An instrument invented by Babington for measuring the evaporation from water, ice, or snow. E. H. Knight. See atmometer.
• noun Atmidometers may be classed as: Micrometric, such as Lamont's, in which the gradual fall of the surface of the water in a shallow pan is measured by the turning of a micrometer-screw, or is counteracted bythe inflow of additional water pushed from a reservoir by means of a micrometer-screw.
• noun Balance atmidorneters, in which the loss of water is shown by loss of weight.
• noun The Piche evaporometer, in which the evaporating surface is a small disk of porous paper closing the lower end of a vertical tube conveying water. The amount of evaporation is shown by measuring the descent of the feed-water in the tube. See cut on page 88.
• noun The Stelling evaporometer, in which the evaporating-pan floats on the surface of a river or lake and the loss of water is measured from hour to hour by measuring either weight or volume.
• noun The lysimeter, in which the evaporation from the surface of growing plants is measured by establishing the plant in a large vessel resting on the pan of a balance.

from the GNU version of the Collaborative International Dictionary of English.

• noun An instrument for measuring the evaporation from water, ice, or snow.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An instrument for measuring the evaporation from water, ice, or snow.