• 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 scoriae

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 scoriae

Historical Examples of scoriae

  • They are at a depth of about 12 ft., in slaty shale containing Llandeilo fossils and contemporaneous felspathic ash and scoriae.

    Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3


  • In some instances the cones are quite intact, and the beds of ash and scoriae are as yet almost unaffected by denuding agencies.

  • The solid matter thrown out by volcanoes consists of lapilli, scoriae, dust and bombs.

  • Along these fissures, in a few days, scoriae cones appeared; on one occasion no less than thirty-six in number.

  • After the scoriae have been skimmed off, the upper and purer portion of the mass is refined, and the lower part re-melted.

British Dictionary definitions for scoriae


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

scoriae 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.