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The Collaborative International Dictionary
Atmidometer

Atmidometer \At`mi*dom"e*ter\, n. [Gr. ?, ?, smoke, vapor + -meter; cf. F. atmidom[`e]tre.] An instrument for measuring the evaporation from water, ice, or snow.
--Brande & C.

Wiktionary
atmidometer

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