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Hint: In most browsers you can lookup any word by double click it.
English
noun
:
optical glass
1.
optical glass
(substance)
clear homogeneous glass of known refractive index; used to make lenses
Broader (hypernym)
glass
Narrower (hyponym)
crown glass
,
flint glass
,
optical crown
,
optical crown glass
,
optical flint
Based on WordNet 3.0 copyright © Princeton University.
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. English edition:
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.
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