What is the meaning of Acetate?

Any ester or salt of acetic acid.

Cellulose acetate.

A transparent sheet used for overlays, whether of cellulose acetate or (loosely) any macroscopically similar plastic.

In full acetate disc: a disc of aluminium covered in a wax used to make demonstration copies of a phonograph record.

second-person singular voseo imperative of acetar combined with te

Source: wiktionary.org