Style sheet

n. sheet that summarizes editorial guidelines relating to and used when preparing text for publication; file that defines styles or form in word processing programs and layout of a document (Computers)

Style sheet (desktop publishing) - a feature of desktop publishing programs.Style sheet (web development)  - W3C standards for web page style sheets such as CSS  or XSL.Stylesheet language - computer languages that describe the presentation of structured documents.
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Noun
1. a sheet summarizing the editorial conventions to be followed in preparing text for publication
(hypernym) sheet, piece of paper, sheet of paper