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[lig-nin] /ˈlɪg nɪn/

Botany. an organic substance that, with cellulose, forms the chief part of woody tissue.
Papermaking. impure matter found in wood pulp.
a complex polymer occurring in certain plant cell walls making the plant rigid

1822, from Latin lignum “wood” (see ligni-) + chemical suffix -in (2).
A complex organic compound that binds to cellulose fibers and hardens and strengthens the cell walls of plants. Lignin is a polymer consisting of various aromatic alcohols, and is the chief noncarbohydrate constituent of wood.


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  • Lignite

    [lig-nahyt] /ˈlɪg naɪt/ noun 1. a soft coal, usually dark brown, often having a distinct woodlike texture, and intermediate in density and carbon content between peat and bituminous coal. /ˈlɪɡnaɪt/ noun 1. a brown carbonaceous sedimentary rock with woody texture that consists of accumulated layers of partially decomposed vegetation: used as a fuel. Fixed carbon […]

  • Lignin-sulfonate

    noun, Chemistry. 1. 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.

  • Lignite-wax

    noun 1. . [mon-tan] /ˈmɒn tæn/ noun 1. a dark-brown bituminous wax extracted from lignite and peat: used chiefly in polishes and waxes for furniture, shoes, etc. /ˈmɒntæn/ noun 1. a hard wax obtained from lignite and peat, varying in colour from white to dark brown. It is used in polishes and candles

  • Lignivorous

    [lig-niv-er-uh s] /lɪgˈnɪv ər əs/ adjective 1. . /lɪɡˈnɪvərəs/ adjective 1. (of animals) feeding on wood

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