Look up: lignin

1. Lignin
   The cross-linked polymer of linked benzene rings that makes hardwood hard. It is an important structural material for most land plants, and is usually found mixed in with cellulose. Partial digestion of lignin by enzymes (completely different from the ones that break down cellulose) gives complex ma...
   Found on http://www.kcpc.usyd.edu.au/discovery/gl
   
   
2. Lignin
   A complex amorphous substance that, in association with cellulose, causes the thickening of xylem vessels and plant cell walls and thereby forms wood or woody parts.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
3. lignin
   (Green plants as organisms) a hard cellulose-like substance which gives rigidity to plant tissues
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
4. lignin
   [n] - a complex polymer
   Found on http://www.webdictionary.co.uk/definitio
   
   
5. Lignin
   A naturally occurring acid substance in wood that breaks down over time. Paper with lignin is not suitable for archival scrapbooking projects.
   Found on http://www.scrapdirectory.co.uk/scrapboo
   
   
6. Lignin
   Substance in trees that holds cellulose fibres together. Free sheet has most lignin removed; groundwood paper contains lignin.
   Found on http://www.tso.co.uk/solutions/publishin
   
   
7. Lignin
   The natural, glue-like substance that holds together the cellulose fibers of wood plants. Lignin that is left in pulp causes paper to age and yellow over time.
   Found on http://www.encyclo.co.uk/local/20829
   
   
8. Lignin
   Non-cellulose material found in wood and other cellulose plants. In the groundwood methods of pulp production the lignin is softened but not removed, and the papers made from groundwood pulp are weaker and more inclined to discolour on exposure to the atmosphere. In the chemical pulp making process ...
   Found on http://www.roberthorne.co.uk/contact/glo
   
   
9. lignin
   binding material for the cellulose in wood Category: Chemistry • Chemical substance which is stored in between the microfibrils during cell-wall growth. Category: Botany and zoology
   Found on http://www.mijnwoordenboek.nl/definition
   
   
10. Lignin
    Complex organic material deposited within the cell walls of plants associated with cellulose, especially in wood and fibers.
    Found on http://www.blackwellpublishing.com/Towns
    
    
11. lignin
    Complex polymer of phenylpropanoid subunits, laid down in the walls of plant cells such as xylem vessels and sclerenchyma. Imparts considerable strength to the wall, and also protects it against degradation by microorganisms. It is also laid down as a defence reaction against pathogenic attack, as part of the hypersensitive response of plants.
    Found on http://www.encyclo.co.uk/visitor-contrib
    
    
12. Lignin
    Lig'nin (lĭg'nĭn) noun [ Latin lignum wood: confer French lignine .] (Botany) A substance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents. » Recent authors have...
    Found on http://www.encyclo.co.uk/webster/L/41
    
    
13. 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 on http://www.mondofacto.com/facts/dictiona
    
    
14. 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 on http://wordnetweb.princeton.edu/perl/web
    
    
15. Lignin
    • (n.) A substance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents.
    Found on http://thinkexist.com/dictionary/meaning
    
    
16. 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 on http://www.britannica.com/eb/a-z/l/50
    
    
17. 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 on http://www.infoplease.com/ce6/sci/A08297
    
    
18. 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 in nature.
    Found on http://www.medilexicon.com/medicaldictio
    
    
19. 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 on http://www.talktalk.co.uk/reference/ency
    
    
20. lignin
    A polymer in the secondary cell wall of woody plant cells that helps to strengthen and stiffen the wall; related term lignified.
    Found on http://www.emc.maricopa.edu/faculty/fara
    
    
21. 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 journal = Current biology : CB -->--> The term was introduced in 1819 by A. P. de Candolle|de Candolle and is derived from the Latin word pub...
    Found on http://en.wikipedia.org/wiki/Lignin