perchloroethylene
noun
per·chlo·ro·eth·y·lene
(ˌ)pər-ˌklȯr-ō-ˈe-thə-ˌlēn
: a colorless nonflammable toxic liquid C2Cl4 used often as a solvent in dry cleaning and for removal of grease from metals
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Merriam-Webster unabridged
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