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British Dictionary definitions for psychological primary

psychological primary

noun
  1. one of a set of perceived colours (red, yellow, blue, green, black, and white) that can be used to characterize all other perceived colours
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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