Also called acetate rayon. a synthetic filament, yarn, or fabric composed of a derivative of the acetic ester of cellulose, differing from viscose rayon in having greater strength when wet and greater sensitivity to high temperatures.
a sheet of clear plastic film fastened over the front of artwork for protection, as an overlay, or the like.
a slow-burning base material, cellulose triacetate, used for motion-picture film to minimize fire hazard during projection, and also for animation cells.
1827, "salt formed by combining acetic acid with a base," from L. acetum "vinegar" (see acetic) + chemical suffix -ate. As a type of synthetic material, it is attested from 1920, short for acetate silk, etc.