A scientist or scholar who studies vapor, atmospheric conditions, and the physical properties of gases and moisture in the air.
From atmology + -ist (person who practices or studies), creating a job title. Atmologists were primarily active in the 18th-19th centuries before meteorology became standardized.
An atmologist was basically an early meteorologist with a more specific obsession with vapor—if you were really into how steam and moisture worked, you called yourself an atmologist and wrote papers about it!
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