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Light metals
light meter
light microscope
light middleweight
light minute
Light money
Light of foot
Light of heart
Light oil
light opera
light pen
light pipe
Light purse
light reaction
light reflex
Light sails
-- light second --
light show
Light sleeper
light source
light speed
light time
light touch
light unit
light up
light upon
Light weight
light welterweight
light whipping cream
Light Within
light year
Light-armed
light-blue
light second
Noun
1.
light second
-
the
distance
light
travels
in
a
vacuum
in
one
second
;
approximately
300
,
000
kilometers
astronomy
unit
,
light
year
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