527 Group â A tax-exempt group organized under section 527 of the Internal Revenue Code to raise money for political activities. These groups are typically parties, candidates, committees or associations organized for the purpose of influencing an issue, policy, appointment or election, be it federal, state or local.
Noun. 1. trichromacy-the normal ability to see colors. chromatic vision, color vision. visual modality, visual sense, vision, sight-the ability to see; the visual faculty.
The Young-Helmholtz theory of color vision is the most widely acknowledged trichromatic theory. Later analyses ascertained that there are three varying retinal cone photopigments with peak sensitivities nearly correlating to the three primary hues of trichromatic theory: green, red, and blue.