preprocess (v.)

also pre-process, "subject to preliminary processing," 1956, from pre- "before" + process (v.). Related: Preprocessed; preprocessing.

Preprocessed foods are not only here but are gaining such a tremendous acceptance that soon there will be little else on the market. This eliminates the need for mixing, peeling, blending and other devices used in the preparation of raw foods. [Popular Mechanics, October 1956]