• Webster's Revised Unabridged Dictionary
    • n Atmidometer An instrument for measuring the evaporation from water, ice, or snow.
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Century Dictionary and Cyclopedia
    • n atmidometer An instrument invented by Babington for measuring the evaporation from water, ice, or snow. E. H. Knight. See atmometer.
    • n atmidometer 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.
    • n atmidometer Balance atmidorneters, in which the loss of water is shown by loss of weight.
    • n atmidometer 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.
    • n atmidometer 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.
    • n atmidometer 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.
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Webster's Revised Unabridged Dictionary
Gr. , , smoke, vapor + -meter,; cf. F. atmidomètre,