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preprocessor

[pree-pros-es-er, -uh-ser or, esp. British, -proh-ses-er, -suh-ser]
noun Computers.
  1. a program that performs some type of processing, as organization of data or preliminary computation, in advance of another program that will perform most of the processing.
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Origin of preprocessor

First recorded in 1965–70; pre- + processor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018