aphotic

[ ey-foh-tik ]
/ eɪˈfoʊ tɪk /

adjective

lightless; dark.

Origin of aphotic

First recorded in 1900–05; a-6 + photic

British Dictionary definitions for aphotic

aphotic
/ (əˈfɒtɪk) /

adjective

characterized by or growing in the absence of light an aphotic plant
of or relating to the zone of an ocean below that to which sunlight can penetrate, usually about 90m (300 ft). This is the lowest level at which photosynthesis can take place

Word Origin for aphotic

C20: from a- 1 + -photic, from Greek phōs light

Scientific definitions for aphotic

aphotic
[ ā-fōtĭk ]

Having no light.
Relating to the region of a body of water that is not reached by sunlight and in which photosynthesis is unable to occur. Compare photic.