Definition of Alum
Al´um
n.
1.
(Chem.)
A
double
sulphate
formed
of
aluminium
and
some
other
element
(
esp
.
an
alkali
metal
)
or
of
aluminium
.
It
has
twenty-four
molecules
of
water
of
crystallization
.
v. t.
1.
To
steep
in
,
or
otherwise
impregnate
with
,
a
solution
of
alum
;
to
treat
with
alum
.
Related Words
Al
,
aluminium
,
aluminum
,
ammonia
alum
,
ammonium
alum
,
atomic
number
13
,
double
salt
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