| dark adaptation n. The physical and chemical adjustments of the eye, including dilation of the pupil and increased activity of rods in the retina, that make vision possible in relative darkness. dark  -a·dapt (därk -d pt) v.dark -a·dapted (därk-dpt d) adj. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | dark adaptation - the process of adjusting the eyes to low levels of illumination; cones adapt first; rods continue to adapt for up to four hours adaptation - (physiology) the responsive adjustment of a sense organ (as the eye) to varying conditions (as of light) |
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