cel·lu·lose 
(sĕlyə-lōs′, -lōz′)
(sĕlyə-lōs′, -lōz′)n.
A polysaccharide, (C6H10O5)n, that is composed of glucose monomers and is the main constituent of the cell walls of plants. It is used in the manufacture of numerous products, including paper, textiles, pharmaceuticals, and insulation.
[French, from cellule, biological cell; see CELLULE.]
cel′lu·losic (-lōsĭk, -zĭk) adj.