IPA: /nɒnˌsɛl.jʊˈloʊ.sɪk/
KK: /nɑnˌsɛl.jəˈloʊ.sɪk/
Not related to or derived from cellulose, which is a substance found in the cell walls of plants.
The fabric is made from noncellulosic fibers, making it more durable than cotton.
Noncellulosic → It is formed from "non-" (meaning not) and "cellulosic" (from "cellulose" which comes from the French "cellulose", meaning a carbohydrate found in plant cell walls). The word "noncellulosic" refers to materials that do not contain cellulose.
Think of 'non-' meaning 'not' and 'cellulosic' relating to 'cellulose', which is a plant material. This helps you remember that noncellulosic means something that does not contain cellulose.