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Definition of “lye” - English Dictionary

"lye" in British English

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lyenoun [U]

uk   /laɪ/ us   /laɪ/
a highly alkaline substance, usually either sodium hydroxide or potassium hydroxide, that can cause severe damage or burns and is used in making cleaning products
(Definition of lye from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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