scoria

noun

sco·​ria ˈskȯr-ē-ə How to pronounce scoria (audio)
plural scoriae ˈskȯr-ē-ˌē How to pronounce scoria (audio)
-ē-ˌī
1
: the refuse from melting of metals or reduction of ores : slag
2
: rough vesicular cindery lava
scoriaceous adjective

Examples of scoria in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In addition to the bright orange lava fountains that make for a dramatic spectacle and wildly shareable social media content, the eruption also sent ash and other material like scoria and so-called Pele’s hair nearly a mile into the atmosphere. Eric MacK, Forbes.com, 26 May 2025 And right next door to this feature is a reddish cone that is obviously a cinder/scoria cone. Erik Klemetti, Discover Magazine, 12 Mar. 2012 AlaskaVeniaminof continues to be active in the Aleutian arc and the latest NASA Earth Observatory imagery (above) captures the small ash plume (and ash deposits) along with the small lava flow that continues to issue from the scoria cone within the main caldera. Erik Klemetti, Discover Magazine, 16 Aug. 2013 There is archaeological evidence that people moved 30 kilometers to the north because much of the area near Sunset Crater was covered in coarse volcanic scoria. Erik Klemetti, Discover Magazine, 7 Mar. 2017 The new eruption at the volcano is likely sourced from one of the two small scoria cones within the caldera. Erik Klemetti, Discover Magazine, 13 June 2013 Larger eruptions of El Reventador, including a VEI 4 eruption in 2002 (see above), have been known to coat Quito with ash (90 km away) and within the 2002 crater, a small scoria cone and lava dome have grown since 2008. Erik Klemetti, Discover Magazine, 25 Jan. 2013 The Campei Flegrei is a large caldera system that most recently produced Monte Nuovo, a scoria cone on the north shore of the Bay of Naples. Erik Klemetti, Discover Magazine, 31 July 2012 Emi Koussi, beyond being MVP #19, is a large shield volcano with a prominent summit caldera along with a number of small parasitic scoria cones on its flanks. Erik Klemetti, Discover Magazine, 21 Feb. 2011

Word History

Etymology

Middle English, from Latin, from Greek skōria, from skōr excrement — more at scatology

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of scoria was in the 14th century

Browse Nearby Words

Cite this Entry

“Scoria.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/scoria. Accessed 31 May. 2025.

Kids Definition

scoria

noun
sco·​ria ˈskōr-ē-ə How to pronounce scoria (audio)
ˈskȯr-
plural scoriae -ē-ˌē How to pronounce scoria (audio)
-ē-ˌī
: rough cindery lava

More from Merriam-Webster on scoria

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