copyeditor

or cop·y ed·i·tor

[kop-ee-ed-i-ter]
noun
  1. a person who edits a manuscript, text, etc., for publication, especially to find and correct errors in style, punctuation, and grammar.
  2. a copyreader.
  3. Also called slot man. the head copyreader on a newspaper.

Origin of copyeditor

An Americanism dating back to 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Contemporary Examples of copyeditor