| trichromat | A person who sees three primary colours; hence, one with normal colour vision. Origin: tri-+ G. Chroma, colour (05 Mar 2000) |
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| trichromatic | <ornithology, zoology> Having or existing in three different phases of colour; having three distinct colour varieties; said of certain birds and insects. Origin: Pref. Tri- + chromatic. Source: Websters Dictionary (01 Mar 1998) |
| trichromatism | <zoology> The quality, state, or phenomenon of being trichromatic. Source: Websters Dictionary (01 Mar 1998) |
| trichromatopsia | Normal colour vision; the ability to perceive the three primary colours. Origin: tri-+ G. Chroma, colour, + opsis, vision (05 Mar 2000) |