[skawr-ee-uh, skohr-]
noun, plural scoriae [skawr-ee-ee, skohr-] .
Metallurgy. the refuse, dross, or slag left after melting or smelting metal; scum.
Geology. a cinderlike basic cellular lava.

1350–1400; Middle English < Latin scōria < Greek skōría, derivative of skôr dung

scoriaceous [skawr-ee-ey-shuhs, skohr-] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
scoria (ˈskɔːrɪə)
n , pl -riae
1.  a rough cindery crust on top of solidified lava flows containing numerous vesicles
2.  refuse obtained from smelted ore; slag
[C17: from Latin: dross, from Greek skōria, from skōr excrement]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
scoria   (skôr'ē-ə)  Pronunciation Key 
Plural scoriae (skôr'ē-ē')
Rough, crusty, solidified lava containing numerous vesicles that originated as gas bubbles in the lava while it was still molten.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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