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lignin

[lig-nin] /ˈlɪg nɪn/
noun
1.
Botany. an organic substance that, with cellulose, forms the chief part of woody tissue.
2.
Papermaking. impure matter found in wood pulp.
Origin of lignin
1815-1825
1815-25; lign- + -in2
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for lignin

lignin

/ˈlɪɡnɪn/
noun
1.
a complex polymer occurring in certain plant cell walls making the plant rigid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for lignin
n.

1822, from Latin lignum "wood" (see ligni-) + chemical suffix -in (2).

Online Etymology Dictionary, © 2010 Douglas Harper
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lignin in Science
lignin
  (lĭg'nĭn)   
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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