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CD
noun
a
small
round
plastic
disc
that
stores
digital
data
,
especially
music
or
computer
files
,
which
is
read
by
a
laser
•
Dad
slid
a
classic
rock
CD
into
the
car
stereo
before
our
road
trip
.
Dad
slid
a
classic
rock
CD
into
the
car
stereo
before
our
road
trip
.
•
The
library
lets
you
borrow
language-learning
CDs
for
free
.
The
library
lets
you
borrow
language-learning
CDs
for
free
.
Coined
in
the
late
1970s
as
an
initialism
of
“
compact
disc
,”
a
format
jointly
developed
by
Philips
and
Sony
.
noun
a
savings
account
at
a
bank
in
which
money
is
locked
for
a
fixed
period
and
earns
a
guaranteed
interest
rate
;
full
form
:
certificate
of
deposit
•
Maria
placed
her
savings
into
a
12-month
CD
to
earn
higher
interest
.
Maria
placed
her
savings
into
a
12-month
CD
to
earn
higher
interest
.
•
When
the
CD
matured
,
Jake
rolled
it
over
into
a
new
one
.
When
the
CD
matured
,
Jake
rolled
it
over
into
a
new
one
.
First
recorded
in
the
United
States
in
the
early
1960s
as
an
abbreviation
of
“
certificate
of
deposit
.”
