glass wool

noun

Definition of glass wool

: glass fibers in a mass resembling wool and being used especially for thermal insulation and air filters

Examples of glass wool in a Sentence

Recent Examples on the Web One of them was completely enclosed within a hefty capsule of cork, coiled wire, glass wool, and steel, through which no electromagnetic radiation could pass; anyone living inside was completely cut off from the Earth’s magnetic field. Jo Marchant, Wired, "The Oysters That Knew What Time It Was," 1 Sep. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'glass wool.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of glass wool

1879, in the meaning defined above

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The first known use of glass wool was in 1879

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Cite this Entry

“Glass wool.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/glass%20wool. Accessed 4 Dec. 2020.

More from Merriam-Webster on glass wool

Britannica.com: Encyclopedia article about glass wool

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