Dictionary  pro'pylene gly'colChem. a colorless, viscous, hygroscopic liquid, C3H8O, used chiefly as a lubricant, as an antifreeze, as a heat transfer fluid, and as a solvent for fats, oils, waxes, and resins. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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