crown glass

crown glass

n.

1. A soda-lime optical glass that is exceptionally hard and clear, with low refraction and low dispersion.

2. A form of window glass made by whirling a glass bubble to make a flat circular disk with a lump left in the center by the glass blower's rod.

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crown glass

n

1. (Physics / General Physics) another name for optical crown

2. (Miscellaneous Technologies / Building) an old form of window glass made by blowing a globe and spinning it until it formed a flat disc

Thesaurus

Noun	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
	2.	crown glass - optical glass of low dispersion and low refractive index optical crown, optical crown glass optical glass - clear homogeneous glass of known refractive index; used to make lenses