Definition of osmotic pressure
os`mot´ic pres´sure
n.
1.
(Physical Chemistry)
The
pressure
which
a
solution
of
a
substance
in
a
liquid
exerts
on
a
semipermeable
membrane
,
through
which
the
solvent
can
diffuse
but
the
dissolved
substance
(
the
solute
)
cannot
diffuse
,
when
separated
across
the
membrane
from
the
pure
solvent
.
In
general
,
the
osmotic
pressure
will
depend
almost
proportionally
up
to
certain
concentrations
upon
the
molal
concentration
of
the
solute
.
Related Words
force
per
unit
area
,
hypertonicity
,
hypotonicity
,
physical
chemistry
,
pressure
,
pressure
level
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