Learn how to say Cellulosic correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word cellulose:
1an insoluble substance which is the main constituent of plant cell walls and of vegetable fibres such as cotton. It is a polysaccharide consisting of chains of glucose monomers.
2paint or lacquer consisting principally of cellulose acetate or nitrate in solution.
mid 19th century: from French, from cellule ‘small cell’ + -ose2