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Definition of lye noun from the Oxford Advanced Learner's Dictionary

lye

noun

/laɪ/

/laɪ/

[uncountable]

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a strongly alkaline chemical used in various industrial processes, including washing
Word OriginOld English lēag, of Germanic origin: related to Dutch loog, German Lauge, also to lather.

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See lye in the Oxford Advanced American Dictionary

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