Word Pronunciation & Dictionary

crown glass

Word Rarity Uncommon

Frequency: Zipf frequency 4.38 in modern English

Syllables: crown -glass
IPA

16

Scrabble Score

10

Letters

2

Syllables

9

Unique Chars

Meaning

noun

An early type of window glass made by blowing glass into a hollow globe (crown) and then flattening it on a punty, reheating and spinning out into a flat disk by centrifugal force.

Uncountable

noun

A variety of glass used in lenses and other optical components due to its low refractive index and dispersion. Originally crown glass was made from alkali-lime silicates with approximately 10% potassium oxide, but similar properties may be attained with other recipes.

Uncountable

Example Sentences

"The convex half of an achromatic lens is composed of crown glass."

Etymology

So called from a crown-like shape given to it in the process of blowing.

Usage

Uncountable

Inflected Forms

crown glasses (plural)

Frequently Paired Words

bullseye

Synonyms

optical crown optical crown glass

Questions

What does crown glass mean?: An early type of window glass made by blowing glass into a hollow globe (crown) and then flattening it on a punty, reheating and spinning out into a flat disk by centrifugal force.
Where does crown glass come from?: So called from a crown-like shape given to it in the process of blowing.

How to pronounce crown glass

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