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1. Having no light.
2. 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.


1. (Biology) characterized by or growing in the absence of light: an aphotic plant.
2. (Physical Geography) 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
[C20: from a-1 + -photic, from Greek phōs light]


(eɪˈfoʊ tɪk)

lightless; dark.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.aphotic - lacking lightaphotic - lacking light; especially not reached by sunlight; "the aphotic depths of the sea where no photosynthesis occurs"
dark - devoid of or deficient in light or brightness; shadowed or black; "sitting in a dark corner"; "a dark day"; "dark shadows"; "dark as the inside of a black cat"
References in periodicals archive ?
pH and DO in the vertical profiles were highest in the euphotic zone, while alkalinity, SRP, and DIN were highest in the aphotic zone (Table 2).
3]) in the discrete sampled depths at the euphotic and aphotic layer, respectively (Fig.
Hanging nearby, the stunning Untitled (Plum and Brown), 1964, part of a group of paintings Rothko made using the same composition, seemed to foreclose suspended depth altogether: A huge, aphotic rectangle framed by a darker border almost lapsed into monochromatic flatness while also serving up the subtle tonal shifts we might associate with Reinhardt.
All of the company's many brands--at all price points--continue to do well in the drug channel, including Aphotic and Edna Valley in the premium market, according to the company.
The fine-grained nature of the sediment, the absence of gravity-flow deposits and the absence of light-dependant organisms suggest that the marls accumulated in a flat, aphotic seabed located below stormwave base.
We covered different substrates, including rock substrate, soil, logs, guano piles, under rocks, sand, among others, from the twilight zone (places with light influence) to aphotic zone (places with permanent darkness).
Aphotic zone carbonate production on a Miocene ramp Central Apennines, Italy.
According to the generic knowledge on the underwater light level, the sea area was divided into photic and aphotic zones.
Turbidity in whole samples collected from both the photic and aphotic zones was assessed according to Wetzel and Likens (1991) by spectrophotometry, and total suspended solids by a gravimetric method as described by Boyd and Tucker (1992).
Luv U Mate also talked about the aphotic zone, the point where sunlight loses its power of transference through the water as summarized by Cameron.
J Occur in rivers and shallow, Coelastrum reticulatum nutrient-rich lakes; sensitive to sedimentation in aphotic layers.