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English - English (Wordnet) dictionary
refractive index
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Noun
the ratio of the velocity of light in a vacuum to that in a medium
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"refractive index"
Words contain
"refractive index"
in its definition in
English - English (Wordnet) dictionary:
optical glass
lead glass
optical crown
optical crown glass
optical flint
flint glass
crown glass
refractometer
refractive
index
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"refractive index"