10. 
    lignin
    <plant biology> Organic substance which act as a binder for the cellulose fibres in wood and certain plants and adds strength and stiffness to the cell walls. ... The chemical structure of lignin is composed of a complex polymer of phenylpropanoid subunits, laid down in the walls of plant cell...
    Found op http://www.mondofacto.com/facts/dictionary?lignin
    
    
11. 
    lignin
    noun a complex polymer; the chief constituent of wood other than carbohydrates; binds to cellulose fibers to harden and strengthen cell walls of plants
    Found op http://wordnetweb.princeton.edu/perl/webwn?s=lignin
    
    
12. 
    Lignin
    • (n.) A substance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents.
    Found op http://thinkexist.com/dictionary/meaning/lignin/
    
    
13. 
    lignin
    complex oxygen-containing organic substance that, with cellulose, forms the chief constituent of wood. It is second only to cellulose as the most ... [6 related articles]
    Found op http://www.britannica.com/eb/a-z/l/50
    
    
14. 
    Lignin
    Lignin or lignen is a complex chemical compound most commonly derived from wood, and an integral part of the secondary cell walls of plants and some algae. The term was introduced in 1819 by de Candolle and is derived from the Latin word lignum, meaning wood. It is one of the most abundant organic ...
    Found op http://en.wikipedia.org/wiki/Lignin
    
    
15. 
    lignin
    A complex aromatic polymer that forms 25–30% of the wood of trees but is found in all vascular plants, mostly between the cells, but also within the cells, and in the cell walls. It makes vegetables firm and crunchy. It functions to regulate the transport of liquid in the living plant (partly ...
    Found op http://www.daviddarling.info/encyclopedia/L/lignin.html
    
    
16. 
    lignin
    lignin (lig'nin) , a highly polymerized and complex chemical compound especially common in woody plants. The cellulose walls of the wood become impregnated with lignin, a process called lignification, which greatly increases the strength and hardness of the cell and gives the necessary rigidity ...
    Found op http://www.infoplease.com/ce6/sci/A0829757.html
    
    
17. 
    lignin
    Type: Term Pronunciation: lig′nin Definitions: 1. A random polymer of coniferyl alcohol accompanying cellulose and present in vegetable fiber and wood cells; a source of vanillin (by oxidation of lignin); lignin composition varies with plant species. It is one of the most abundant biopolymers ...
    Found op http://www.medilexicon.com/medicaldictionary.php?t=50226
    
    
18. 
    lignin
    Naturally occurring substance produced by plants to strengthen their tissues. It is difficult for enzymes to attack lignin, so living organisms cannot digest wood, with the exception of a few specialized fungi and bacteria. Lignin is the essential ingredient of all wood and is, therefore, of great c...
    Found op http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0007001.html
    
    
19. 
    lignin
    A polymer in the secondary cell wall of woody plant cells that helps to strengthen and stiffen the wall; related term lignified.
    Found op http://www.emc.maricopa.edu/faculty/farabee/biobk/biobookglossl.html
    
    
20. 
    lignin
    1) Polymer
    Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/lignin/1
    
    
21. 
    Lignin
    The phenol -counting colorless substance that is incorporated into the plant cell wall, thereby causing the lignification (lignification, Latin lignum = wood). He is also responsible for the so-called "yellowing" of paper. Lignin is the second most common after the cellulose organic substa...
    Found op http://www.wein-plus.eu/en/Lignin_3.0.13280.html
    
    

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