Definition of osmotic pressure in US English:

osmotic pressure


  • The pressure that would have to be applied to a pure solvent to prevent it from passing into a given solution by osmosis, often used to express the concentration of the solution.

    • ‘The glucose osmotic pressure in solution with water is proportional to the glucose concentration in the outer solution.’
    • ‘The driving force for the osmotic pressure is the higher concentration of sodium ions in the beads than in the outside water.’
    • ‘If a U-shaped glass tube were divided in two by a semipermeable membrane and filled with two solutions the osmotic pressure could be shown.’
    • ‘However, it seems that organic acids account for less than half of the osmotic pressure induced by osmotically active compounds other than sugars.’
    • ‘The solution also creates a strong osmotic pressure on the cell walls of bacteria and other micro-organisms, which prevents them from passing substances in or out.’


osmotic pressure

/äzˌmätik ˈpreSHər/