Definition of osmotic pressure
: the pressure produced by or associated with osmosis and dependent on molar concentration and absolute temperature: such as
a
: the maximum pressure that develops in a solution separated from a solvent by a membrane permeable only to the solvent
b
: the pressure that must be applied to a solution to just prevent osmosis
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Merriam-Webster unabridged
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Time Traveler for osmotic pressure
The first known use of osmotic pressure was in 1888
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