sco·​ria | \ˈskȯr-ē-ə \
plural scoriae\ˈskȯr-​ē-​ˌē, -​ē-​ˌī \

Definition of scoria 

1 : the refuse from melting of metals or reduction of ores : slag

2 : rough vesicular cindery lava

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Other Words from scoria

scoriaceous \ˌskȯr-​ē-​ˈā-​shəs \ adjective

Examples of scoria in a Sentence

Recent Examples on the Web

As if the Easter Island statues weren’t enigmatic enough, a few of them are wearing hats—6.5-foot-wide, 13-ton cylinders of cindery red volcanic rock called scoria. Kiona N. Smith, Ars Technica, "How does a preindustrial society put a 13-ton hat on a statue?," 5 June 2018

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

First Known Use of scoria

14th century, in the meaning defined at sense 1

History and Etymology for scoria

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

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Time Traveler for scoria

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

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More from Merriam-Webster on scoria

Rhyming Dictionary: Words that rhyme with scoria Encyclopedia article about scoria

Comments on scoria

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having a pattern of small flowers

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