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5 definitions found
From:
DICT.TW English-Chinese Dictionary 英漢字典
al·um
/ˈæləm/
明礬
From:
DICT.TW English-Chinese Medical Dictionary 英漢醫學字典
al·um
/ˈæləm/
名詞
[=
aluminium
]鋁
From:
Webster's Revised Unabridged Dictionary (1913)
Al·um
n.
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
.
Note:
☞
Common
alum
is
the
double
sulphate
of
aluminium
and
potassium
.
It
is
white
,
transparent
,
very
astringent
,
and
crystallizes
easily
in
octahedrons
.
The
term
is
extended
so
as
to
include
other
double
sulphates
similar
to
alum
in
formula
.
From:
Webster's Revised Unabridged Dictionary (1913)
Al·um
v. t.
To
steep
in
,
or
otherwise
impregnate
with
,
a
solution
of
alum
;
to
treat
with
alum
.
◄
►
From:
WordNet (r) 2.0
alum
n
1:
a
white
crystalline
double
sulfate
of
aluminum
:
the
ammonium
double
sulfate
of
aluminum
[
syn
:
ammonia alum
, {
ammonium
alum
]
2:
a
white
crystalline
double
sulfate
of
aluminum
:
the
potassium
double
sulfate
of
aluminum
[
syn
:
potassium alum
,
potash alum
]
3:
a
person
who
has
received
a
degree
from
a
school
(
high
school
or
college
or
university
) [
syn
:
alumnus
,
alumna
,
graduate
,
grad
]
4:
a
double
sulphate
of
aluminum
and
potassium
that
is
used
as
an
astringent
(
among
other
things
)
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