scoria

[ skawr-ee-uh, skohr- ]
/ ˈskɔr i ə, ˈskoʊr- /

noun, plural sco·ri·ae [skawr-ee-ee, skohr-] /ˈskɔr iˌi, ˈskoʊr-/.

Metallurgy. the refuse, dross, or slag left after melting or smelting metal; scum.
Geology. a cinderlike basic cellular lava.

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. 2019

Examples from the Web for scoria

British Dictionary definitions for scoria

scoria

/ (ˈskɔːrɪə) /

noun plural -riae (-rɪˌiː)

a rough cindery crust on top of solidified lava flows containing numerous vesicles
refuse obtained from smelted ore; slag
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

Science definitions for scoria

scoria

[ skôrē-ə ]

Plural scoriae (skôrē-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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.