volcanic glass

noun

Definition of volcanic glass

: natural glass produced by the cooling of molten lava too rapidly to permit crystallization

Examples of volcanic glass in a Sentence

Recent Examples on the Web For instance, in the mortar used during the first phase of construction, pink pozzolana was used exclusively, while the mortar used in the second phase also contained volcanic glass—typical of a different deposit of pink pozzolana further afield. Jennifer Ouellette, Ars Technica, 17 Feb. 2022 The Aztecs believed that obsidian had spiritual significance, and it was used in their medicinal practices, as well as a way to ward off bad spirits or even capture souls by using the reflective nature of the volcanic glass. Ashley Strickland, CNN, 6 Oct. 2021 The nearly 500-year-old mirror, made from volcanic glass, had spiritual significance for the Aztecs -- and Dee used it in a spooky way. Ashley Strickland, CNN, 9 Oct. 2021 An analysis of the obsidian mirror, made from volcanic glass, and three other similar objects at the British Museum revealed their Mexican origins. Ashley Strickland, CNN, 6 Oct. 2021 At its core, this question is equivalent to asking when magma from below will travel up through a conduit (the pipe between the magma and the surface opening) and break through, as lava flows and ash, as volcanic glass and bombs. Robin George Andrews, Wired, 6 June 2021 At its core, this question is equivalent to asking when magma from below will travel up through a conduit (the pipe between the magma and the surface opening) and break through, as lava flows and ash, as volcanic glass and bombs. Robin George Andrews, Wired, 6 June 2021 At its core, this question is equivalent to asking when magma from below will travel up through a conduit (the pipe between the magma and the surface opening) and break through, as lava flows and ash, as volcanic glass and bombs. Robin George Andrews, Wired, 6 June 2021 At its core, this question is equivalent to asking when magma from below will travel up through a conduit (the pipe between the magma and the surface opening) and break through, as lava flows and ash, as volcanic glass and bombs. Robin George Andrews, Wired, 6 June 2021 See More

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

First Known Use of volcanic glass

1780, in the meaning defined above

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Time Traveler for volcanic glass

Time Traveler

The first known use of volcanic glass was in 1780

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Dictionary Entries Near volcanic glass

volcanic foci

volcanic glass

volcanicity

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Statistics for volcanic glass

Cite this Entry

“Volcanic glass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/volcanic%20glass. Accessed 9 Aug. 2022.

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More from Merriam-Webster on volcanic glass

Britannica.com: Encyclopedia article about volcanic glass

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