crown glass


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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.

crown glass

n
1. (General Physics) another name for optical crown
2. (Building) an old form of window glass made by blowing a globe and spinning it until it formed a flat disc

crown′ glass`


n.
1. an optical glass of low dispersion and generally low index of refraction.
2. an old form of window glass formed by blowing a globe and whirling it into a disk.
[1700–10]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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 glass - clear homogeneous glass of known refractive index; used to make lenses
References in periodicals archive ?
The composition means it is half the weight and twice the strength of standard crown glass.
Bathed in glory The most memorable time that I was lucky enough to witness the Northern Lights was during an Inghams (inghams.co.uk) holiday to Lapland, when we booked into the Golden Crown Glass Igloos near Levi.
Which company originated as St Helens Crown Glass Company in 1826?
Dr Ajith Kumar, CEO of LL, told Holography News[R] that from January 2015 they will be offering Darol coated on to Schott BK7 borosilicate crown glass plates, size 150 x 150 mm.
Slowing down, there's a trip to the Golden Crown glass igloos where stargazers and Northern Lights worshippers can enjoy uninterrupted views from behind heated, double glazing.
More expensive models use barium crown glass (BAK-4).