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WordReference Random House Unabridged Dictionary of American English © 2024lig′nin sul′fonate, [Chem.]a brown powder consisting of a sulfonate salt made from waste liquor of the sulfate pulping process of soft wood: used in concrete, leather tanning, as an additive in oil-well drilling mud, and as a source of vanillin. Also called lig•no•sul•fo•nate (lig′nə sul′fə nāt′).USA pronunciation
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