dew' point"

the temperature to which air must be cooled, at a given pressure and water-vapor content, for it to reach saturation; the temperature at which dew begins to form. Also called dew'-point tem"perature. Cf. absolute humidity, mixing ratio, relative humidity, specific humidity.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

dew plantdew-point spread
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