Cellulose acetate and Cellulose ester

Cellulose acetate noun - An ester of acetic acid; used in fibers and fabrics; photographic films and varnishes.

Cellulose ester and cellulose acetate are semantically related. In some cases you can use "Cellulose ester" instead a noun phrase "Cellulose acetate".

Cellulose ester noun - Any ester of cellulose with an acid.

Cellulose acetate and cellulose ester are semantically related. Sometimes you can replace phrase "Cellulose acetate" with "Cellulose ester", this phrases are similar.