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four-colour

noun
  1. (modifier) (of a print or photographic process) using the principle in which four colours (magenta, cyan, yellow, and black) are used in combination to produce almost any other colour
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for four-colour

Historical Examples

  • Occasionally three and four-colour machines are used, but the one-colour type is probably the most common.

    The Jute Industry: From Seed to Finished Cloth

    T. Woodhouse and P. Kilgour