Aphotic Definition
ā-fōtĭk
adjective
Without light; specif., pertaining to that part (aphotic zone) of the ocean below a depth of c. 100 m (c. 328 ft) which does not receive sufficient sunlight for photosynthesis.
Webster's New World
Of or relating to the region of a body of water that is not reached by sunlight and in which photosynthesis is unable to occur.
American Heritage
(chiefly) Describing that part of the deep oceans and lakes where photosynthesis is not possible.
Wiktionary
Having no light.
American Heritage
Origin of Aphotic
-
a- + photic
From Wiktionary
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