optical glass 1
noundomain: substance
Princeton WordNet [ver.3.1]
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EnglishDefinition
clear homogeneous glass of known refractive index; used to make lenses
Hypernym
glass 1
noun
a brittle transparent solid with irregular atomic structure
EnglishHyponym
optical crown 1
noun
optical glass of low dispersion and low refractive index
optical flint 1
noun
optical glass of high dispersion and high refractive index
