Definition of Manganese
Man`ga`nese´
n.
1.
(Chem.)
An
element
obtained
by
reduction
of
its
oxide
,
as
a
hard
,
grayish
white
metal
,
fusible
with
difficulty
(
melting
point
1244°
C
),
but
easily
oxidized
.
Its
ores
occur
abundantly
in
nature
as
the
minerals
pyrolusite
,
manganite
,
etc
.
Symbol
Mn
.
Atomic
number
25
;
Atomic
weight
54
.938 [
C
=
12
.
011
].
Black oxide of manganese
(Chem.)
a
heavy
black
powder
MnO2
,
occurring
native
as
the
mineral
pyrolusite
,
and
valuable
as
a
strong
oxidizer
; -
called
also
familiarly
manganese
.
It
colors
glass
violet
,
and
is
used
as
a
decolorizer
to
remove
the
green
tint
of
impure
glass
.
Related Words
atomic
number
25
,
hausmannite
,
manganite
,
metal
,
metallic
element
,
Mn
,
psilomelane
,
pyrolusite
,
rhodochrosite
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