speed of light
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speed of light Definition
(n)
the
speed
at
which
light
travels
in
a
vacuum
;
the
constancy
and
universality
of
the
speed
of
light
is
recognized
by
defining
it
to
be
exactly
299
,
792
,
458
meters
per
second
speed of light Synonyms
c
light speed
speed of light
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