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graphite
noun
a
soft
,
black
,
slippery
substance
that
is
a
form
of
carbon
.
It
is
used
for
making
pencils
,
lubricants
,
and
parts
of
batteries
.
•
The
inside
of
this
pencil
is
made
from
graphite
.
The
inside
of
this
pencil
is
made
from
graphite
.
•
Graphite
is
used
as
a
lubricant
for
locks
.
Graphite
is
used
as
a
lubricant
for
locks
.
Mid-18th
century
:
from
German
Graphit
,
from
Latin
graphites
(
a
writing
material
),
from
Greek
graphein
(“
to
write
”),
because
it
leaves
a
mark
when
writing
.
