/ ˈseljuləʊs; NAmE -loʊs/ noun [ U ]
1.
a natural substance that forms the cell walls of all plants and trees and is used in making plastics, paper, etc.
2.
any compound of cellulose used in making paint, lacquer , etc.
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WORD ORIGIN
mid 19th cent.: from French , from cellule small cell + -ose .