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The rate at which atmospheric temperature decreases with increasing altitude in conditions of thermal equilibrium.
‘For unsaturated moist air the adiabatic lapse rate is almost the same as the dry adiabatic lapse rate.’
‘A representative estimate of the saturation adiabatic lapse rate is 6 Celsius degrees per kilometer.’
‘Parcels of air, or thermals, which are isolated from the surrounding atmosphere, cool at a predetermined rate known as the adiabatic lapse rate.’
‘All that technobabble is Greek to the Professor, however, whose lack of expertise is such that there is no telling the difference between an adiabatic lapse rate and a diabetic Lap's rat.’
‘If the lapse rate is less than the moist adiabatic lapse rate, the atmosphere is absolutely stable.’