Webster's English Dictionary

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cellulose

cel.lu.lose \'sel-y*-.lo-s, -.lo-z\ n [F, fr. cellule living cell, fr. NL 
   cellula] : a complex polymeric carbohydrate (C6H10O5)x yiel ding only 
   glucose on complete hydrolysis, constituting the chief part of the cell 
   walls of plants, and yielding many fibrous products