lignocellulose
noun
                                                                                                                            
                                                            lig·no·cel·lu·lose
                    
                                                                                                              
                                                                                                                                  ˌlig-nō-ˈsel-yə-ˌlōs  
                                                                                                                              
            -ˌlōz
                                                      
                                                          
                                
              
          
                                                      : any of several closely related substances constituting the essential part of woody cell walls of plants and consisting of cellulose intimately associated with lignin                                      
                
                    
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  Merriam-Webster unabridged




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