DICHROMATISM
\dˈa͡ɪkɹə͡ʊmətˌɪzəm], \dˈaɪkɹəʊmətˌɪzəm], \d_ˈaɪ_k_ɹ_əʊ_m_ə_t_ˌɪ_z_ə_m]\
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a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision)
By Princeton University
Word of the day
dust storm
- a windstorm that lifts up clouds of dust or sand a windstorm that lifts up clouds dust or sand; "it was the kind of duster not experienced in years"