EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > CLOUD PRECIPITABLE WATER
The total atmospheric water vapor contained in a vertical column of
unit cross-sectional area (in a cloud) extending between any two specified
levels, commonly expressed in terms of the height to which that water
substance would stand if completely condensed and collected in a vessel of
the same unit cross section.
The Glossary of Weather and Climate, American Meteorological Society, 1996.