crown glass

noun

1
: a glass blown and whirled into the form of a disk with a center lump left by the worker's rod
2
: alkali-lime silicate optical glass having relatively low refractive index and low dispersion value

Word History

First Known Use

1694, in the meaning defined at sense 1

Time Traveler
The first known use of crown glass was in 1694

Dictionary Entries Near crown glass

Cite this Entry

“Crown glass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/crown%20glass. Accessed 17 Apr. 2024.

Kids Definition

crown glass

noun
: a very clear glass that is used for optical instruments

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