secondary color definition by American Heritage Dictionary
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A color produced by mixing two primary colors in equal proportions. See Table at color.
secondary color - Science Definition
A color produced by mixing two additive primary colors in equal proportions. The secondary colors are cyan (a mixture of blue and green), magenta (a mixture of blue and red), and yellow (a mixture of green and red). Each secondary color is also the complementary color (or complement ) of the primary color whose wavelength it does not contain. Thus cyan is the complement of red, magenta is the complement of green, and yellow is the complement of blue. See Note at color.