dark adaptation dark • dark-adapted · · · Info · Definitions · Characters · · dark adaptation · · Text Common · · Latin · · Scripts 15 · · Length 5 · · Syllables Definitions · · · (noun) the process of adjusting the eyes to low levels of illumination; cones adapt first; rods continue to adapt for up to four hours. Synonyms: dark adaptation. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 i latin small letter i U+0069 k latin small letter k U+006B n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074