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Webster 1913 Edition

Noun.

[Gr. [GREEK] smoke, vapor +

-meter

: cf. F.

atmomètre

An instrument for measuring the rate of evaporation from a moist surface; an evaporometer.

Huxley.

Noun.

[Gr. vapor, and to measure.]

An instrument to measure the quantity of exhalation from a humid surface in a given time; an evaporometer.

atmometer ‎(plural atmometers)