• synonyms


[skawr-ee-uh, skohr-]
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noun, plural sco·ri·ae [skawr-ee-ee, skohr-] /ˈskɔr iˌi, ˈskoʊr-/.
  1. Metallurgy. the refuse, dross, or slag left after melting or smelting metal; scum.
  2. Geology. a cinderlike basic cellular lava.
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Origin of scoria

1350–1400; Middle English < Latin scōria < Greek skōría, derivative of skôr dung
Related formssco·ri·a·ceous [skawr-ee-ey-shuh s, skohr-] /ˌskɔr iˈeɪ ʃəs, ˌskoʊr-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for scoria

slag, magma, basalt, lava, slack, smut, ember, char, stoke, carbon, fuel, cinder, spark, charcoal, culm, scoria, ash, anthracite, refuse, trash

Examples from the Web for scoria

Historical Examples of scoria

  • Here, Oliver, lad, look at the great pieces of scoria and pumice.

    Fire Island

    G. Manville Fenn

  • The scoria is let off occasionally, through holes made for the purpose.

  • Rabbits burrow in the heaps of scoria on the slopes of the mountains.

  • The telescope reveals a parapet of scoria on the brim, as on Teneriffe.

  • On approaching nearer the apex, the path was over cinders, fine black sand, and scoria.

British Dictionary definitions for scoria


noun plural -riae (-rɪˌiː)
  1. a rough cindery crust on top of solidified lava flows containing numerous vesicles
  2. refuse obtained from smelted ore; slag
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Derived Formsscoriaceous (ˌskɔːrɪˈeɪʃəs), adjective

Word Origin for scoria

C17: from Latin: dross, from Greek skōria, from skōr excrement
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

scoria in Science


Plural scoriae (skôrē-ē′)
  1. Rough, crusty, solidified lava containing numerous vesicles that originated as gas bubbles in the lava while it was still molten.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.