Ba a samun kalmar "dichromia" a daidaitattun ƙamus na Turanci. Duk da haka, irin wannan kalma, "dichromatism," tana nufin yanayin zama dichromatic, wanda ke nufin samun nau'i biyu kawai na masu karɓar launi a cikin idanu maimakon uku na yau da kullum. Wannan na iya haifar da wahalar bambance tsakanin wasu launuka, musamman tsakanin inuwar ja da kore.
