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crown glass

PRIMARY MEANINGS OF: crown glass

1
 n
optical glass of low dispersion and low refractive index
2
 n
a glass blown into a globe which is later flattened and spun to form a disk
FULL DEFINITIONS OF: crown glass
1

n optical glass of low dispersion and low refractive index

Synonyms:
optical crown, optical crown glass
Type of:
optical glass
clear homogeneous glass of known refractive index; used to make lenses
2

n a glass blown into a globe which is later flattened and spun to form a disk

Type of:
glass
a brittle transparent solid with irregular atomic structure
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