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Definition of Propylene glycol
1. Noun. A sweet colorless, viscous, hygroscopic liquid used as an antifreeze and in brake fluid and also as a humectant in cosmetics and personal care items although it can be absorbed through the skin with harmful effects.
Definition of Propylene glycol
1. Noun. (chemistry) 1,2-propanediol, CH3CH(OH)CH2OH, a thick oily liquid, used as an antifreeze and in many industrial applications ¹
¹ Source: wiktionary.com