On-line Dictionary
Arsenic
Arsenic
n.
One
of
the
elements
, a
solid
substance
resembling
a
metal
in
its
physical
properties
,
but
in
its
chemical
relations
ranking
with
the
nonmetals
. It is of a
steel
-
gray
color
and
brilliant
luster
,
though
usually
dull
from
tarnish
. It is
very
brittle
,
and
sublimes
at
356
¡
Fahrenheit
. It is
sometimes
found
native
,
but
usually
combined
with
silver
,
cobalt
,
nickel
,
iron
,
antimony
, or
sulphur
.
Orpiment
and
realgar
are
two
of
its
sulphur
compounds
,
the
first
of
which
is
the
true
arsenicum
of
the
ancients
.
The
element
and
its
compounds
are
active
poisons
.
Specific
gravity
from
5.7 to 5.9.
Atomic
weight
75.
Symbol
As.
Arsenic
n.
Arsenious
oxide
or
arsenious
anhydride
;
called
also
arsenious
acid
,
white
arsenic
,
and
ratsbane
.
Arsenic
a.
Pertaining
to, or
derived
from
,
arsenic
;
said
of
those
compounds
of
arsenic
in
which
this
element
has
its
highest
equivalence
; as,
arsenic
acid
.
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