lignin

[lig-nin] Origin

lig·nin

[lig-nin]
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:
1815–25; lign- + -in2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Lignin is always a great word to know.
So is eukaryotic organism. Does it mean:
form of a diploid plant in the alternation of generations that produces asexual spores
organism that has a nucleus containing genetic material
Collins
World English Dictionary
lignin (ˈlɪɡnɪn)
 
n
a complex polymer occurring in certain plant cell walls making the plant rigid

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

lignin
1822, from L. lignum "wood" (see lecture) + -in.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
lignin   (lĭg'nĭn)  Pronunciation Key 
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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