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Refortification
Refortify
Refossion
Refound
Refounder
Refract
Refractable
Refracted
refractile
Refracting
Refracting angle of a prism
refracting telescope
Refraction
Refraction circle
Refraction of latitude
Refractive
-- refractive index --
Refractiveness
refractivity
Refractometer
Refractor
Refractorily
Refractoriness
Refractory
refractory anaemia
refractory anemia
refractory period
refractory pot
refractory-lined
Refracture
Refragable
Refragate
Refrain
refractive index
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Noun
1.
refractive index
-
the
ratio
of
the
velocity
of
light
in
a
vacuum
to
that
in
a
medium
Synonyms:
index of refraction
index
of
refraction
,
ratio
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