English

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Etymology 1

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From pre- +‎ composed.

Adjective

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precomposed (not comparable)

  1. Composed in advance.
  2. (computing) Describing a character that can also be represented an equivalent string of other characters (typically a letter and a diacritical mark).
    • 2009, Ian H. Witten, David Bainbridge, David M. Nichols, How to Build a Digital Library, 2nd edition, Morgan Kaufmann, →ISBN, page 383:
      For example, the middle letter of naïve could be represented using the combining character approach by U+0069 U+0308, or as a single, precomposed unit using the already prepared character U+00EF. Around 500 precomposed Latin letters, for instance, in the Unicode standard are superfluous, in that they can be represented using combining character sequences.

Further reading

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Etymology 2

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From precompose +‎ -ed.

Verb

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precomposed

  1. simple past and past participle of precompose