crown glass

noun

Definition of crown glass

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

First Known Use of crown glass

1694, in the meaning defined at sense 1

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The first known use of crown glass was in 1694

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Cite this Entry

“Crown glass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/crown%20glass. Accessed 23 Jun. 2021.

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More from Merriam-Webster on crown glass

Britannica.com: Encyclopedia article about crown glass

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