Osmotic pressure is pressure
created in aqueous solution by
region of lower concentration
upon a of higher solute
forcing the passage
water from that this more
concentrated . The intensity of
osmotic pressure (in of
pressure) is to the pressure
is necessary to in the solution
prevent its dilution the entering of
by osmosis.

It possible to apply the solution
another in the contrary to
the osmotic , like the
hydrostatic of the liquid the
atmospheric pressure. cells, for
example, rigid cell wall
opposite pressure against tendency
of water enter when the is put
under hypotonic environment.
Microscopically, pressure contrary to
osmotic pressure does forbid
water to through a semipermeable
but it creates
compensatory flux of in the
opposite .