Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun crown_glass

2 senses of crown glass

Sense 1
crown glass -- (a glass blown into a globe which is later flattened and spun to form a disk)
       => glass -- (a brittle transparent solid with irregular atomic structure)

Sense 2
optical crown, crown glass, optical crown glass -- (optical glass of low dispersion and low refractive index)
       => optical glass -- (clear homogeneous glass of known refractive index; used to make lenses)