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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(eɪˈfoʊ tɪk)

lightless; dark.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
But mostly this is a cold, aphotic vision, as lacking in light as the immense void Monte's spaceship is flying into.
That element also plays into the stormwater runoff system.<br />Although architects and city leaders often refer to the Scissortail body of water as a lake, it's actually a pond because the water is shallow enough to allow light to reach the bottom; lakes have aphotic zones, or the absence of photons after a certain depth.<br />Hargreaves has produced similar water features in parks around the world, such as South Lake Union Park in Seattle, Washington, and Shelby Farms Park in Shelby County, Tennessee.
Three sampling points were considered: the confluence of two feeder rivers (PC), near the net cages (PNC), and in the dam zone (PD); while samples were taken in the euphotic ([Z.sub.eup]) and aphotic zones ([Z.sub.aph]).
Chl-a values, as an indicator of phytoplankton biomass, ranged from 0.6-16.0 mg Chl-a [m.sup.-3] (average: 5.2 mg Chl-a [m.sup.-3]) and 0.7-2.4 mg Chl-a [m.sup.-3] (average: 1.4 mg Chl-a [m.sup.-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.
Words such as 'precarity', 'chiaroscuro', 'lucent' and 'aphotic' may have young readers reaching for a dictionary, but 'corvid', 'klepteffigium', and 'Domna' are clearly unique to this world and are clear enough in context not to hamper the galloping pace of the plot.
According to the generic knowledge on the underwater light level, the sea area was divided into photic and aphotic zones.