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Picture Dictionary
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spectrum
noun
-
spectrum
,
spectra
a
band
of
colours
or
other
kinds
of
light
arranged
by
wavelength
,
such
as
the
colours
you
see
when
sunlight
passes
through
a
prism
•
A
rainbow
shows
the
visible
spectrum
of
sunlight
after
rain
.
A
rainbow
shows
the
visible
spectrum
of
sunlight
after
rain
.
•
In
science
class
,
the
teacher
shone
a
flashlight
through
a
glass
prism
,
and
the
wall
lit
up
with
a
colourful
spectrum
.
In
science
class
,
the
teacher
shone
a
flashlight
through
a
glass
prism
,
and
the
wall
lit
up
with
a
colourful
spectrum
.
mid-17th
century
:
from
Latin
specere
‘
to
look
’
→
spectrum
‘
image
,
apparition
’.
It
was
first
used
in
optics
to
describe
the
band
of
colours
given
by
a
prism
.
noun
-
spectrum
,
spectra
a
wide
and
continuous
range
of
different
but
related
ideas
,
qualities
,
or
things
between
two
extremes
•
The
students
held
opinions
across
the
political
spectrum
,
from
conservative
to
liberal
.
The
students
held
opinions
across
the
political
spectrum
,
from
conservative
to
liberal
.
•
The
summer
festival
features
a
broad
spectrum
of
music
,
including
jazz
,
rock
,
and
classical
.
The
summer
festival
features
a
broad
spectrum
of
music
,
including
jazz
,
rock
,
and
classical
.
figurative
use
recorded
since
the
late
19th
century
,
extending
the
physical
meaning
of
‘
spectrum
’
to
abstract
ranges
.
