Definition of Os
n.
1.
A
bone
.
1.
A
mouth
;
an
opening
;
an
entrance
.
1.
(Geol.)
One
of
the
ridges
of
sand
or
gravel
found
in
Sweden
,
etc
.,
supposed
by
some
to
be
of
marine
origin
,
but
probably
formed
by
subglacial
waters
.
The
osar
are
similar
to
the
kames
of
Scotland
and
the
eschars
of
Ireland
.
See
Eschar
.
1.
(Chem.)
The
chemical
symbol
for
the
element
osmium
.
Related Words
atomic
number
76
,
metal
,
metallic
element
,
osmium
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