aphotic

aphotic
    adj 1: lacking light; especially not reached by sunlight; "the
           aphotic depths of the sea where no photosynthesis occurs"
    

Aphotic \A*pho"tic\ ([.a]*f[=o]"t[i^]k), a. [Gr. 'a`fws,
   'a`fwtos.]
   Without light.
   [Webster 1913 Suppl.]