[per-klawr-oh-eth-uh-leen, -klohr-]
noun Chemistry.

1870–75; perchloro- + ethylene Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
perchloroethylene or perchloroethene (pəˌklɔːrəʊˈɛθɪliːn, pəˌklɔːrəʊˈɛθiːn)
a colourless liquid used as a dry-cleaning solvent. Formula: CCl2:CCl2
perchloroethene or perchloroethene

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Science Dictionary
perchloroethylene   (pər-klôr'ō-ěth'ə-lēn')  Pronunciation Key 
See tetrachloroethylene.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica


a colourless, dense, nonflammable, highly stable liquid belonging to the family of organic halogen compounds. Tetrachloroethylene is a powerful solvent for many organic substances. By the mid-20th century it had become the most widely used solvent in dry cleaning (displacing carbon tetrachloride and trichloroethylene) and was also commonly used for cleaning metal objects in vapour-degreasing apparatuses. Its broad acceptance has been based upon its nonflammability and low toxicity. Small quantities are also employed as a vermifuge, particularly against hookworm (see ).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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