Definition of "dewpoint" [dewpoint]

• Alternative spelling of dew point. (noun)

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• "(The word "dewpoint" arose from the observation that dew forms on grass when the grass cools, by radiation to the sky, to a temperature equal to or less than the wetbulb temperature of the air above it.)"
• "(The dewpoint is the temperature at which the air becomes saturated with water vapor and it begins to precipitate."
• "The vertical temperature (solid lines) and dewpoint (dashed) profiles for a typical freezing rain event (left panel) versus last night (right hand panel)."