Search Result for "dark adaptation":
Wordnet 3.0

NOUN (1)

1. the process of adjusting the eyes to low levels of illumination; cones adapt first; rods continue to adapt for up to four hours; 



WordNet (r) 3.0 (2006):

dark adaptation
    n 1: the process of adjusting the eyes to low levels of
         illumination; cones adapt first; rods continue to adapt for
         up to four hours