Definition of osmium
os´mi`um
Pronunciation:
ǒz´mĭ`ŭm
n.
1.
(Chem.)
A
rare
metallic
element
of
the
platinum
group
with
atomic
number
76
.
It
is
found
native
as
an
alloy
in
platinum
ore
,
and
in
iridosmine
.
It
is
a
hard
,
infusible
,
bluish
or
grayish
white
metal
,
and
the
heaviest
substance
known
.
Its
tetroxide
is
used
in
histological
experiments
to
stain
tissues
.
Symbol
Os
.
Atomic
weight
190
.
2
.
Specific
gravity
22
.
477
.
Related Words
atomic
number
76
,
metal
,
metallic
element
,
Os
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Osculum
Osier
Osier bed
osier cornel
Osiered
Osiery
Osiris
Osmanli
Osmate
Osmaterium
Osmazome
Osmiamate
Osmiamic
Osmic
Osmic acid
Osmic tetroxide
Osmidrosis
Osmious
Osmious acid
osmite
osmogene
osmograph
osmometer
Osmometry
Osmose
osmosis
osmotic
osmotic pressure
Osmund
Osnaburg
Oso-berry
Osphradium
Osprey
Oss
Osse
Ossean
Ossein
Osselet
Osseous
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