ˈfōd.ik adjective
Etymology: phot- + -ic
1.
a. : of, relating to, or caused by light
b. : of or relating to the reaction to or the production of light by living organisms
2.
a. : penetrated by light especially of the sun
photic layers
b. : of, relating to, or constituting the part of the oceanic waters of the seas that light is able to penetrate — compare abyssal
• pho·ti·cal·ly -k(ə)lē adverb