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A light-producing organ that is found especially in marine fishes and that generates light either from intrinsic biochemical reactions or from symbiotic luminescent bacteria.
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.


(Zoology) zoology any light-producing organ in animals, esp in certain fishes
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈfoʊ təˌfɔr, -ˌfoʊr)

a luminous organ of certain fishes and crustaceans.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
nov., is distinguished from its congener by a putative pit organ located ventrally just posterior of the lower jaw margin center, photophores irregularly distributed along many areas of the body, 16 distinct ventral-abdominal photophore aggregations, and two differences associated with the dentition," the researchers described the new shark species in ( Zootaxa.
"There is this fish that has a photophore underneath its eye that it uses as a flashlight to look for prey," he said.
C'est l'art de modifier, detourner et personnaliser un objet deja existant, en ajoutant des motifs attirants sur les t-shirts, par exemple, en donnant un nouveau souffle a un bocal en verre pour le transformer en photophore ou encore en dessinant sur une bouteille en plastique pour se muer en vase.
Diagnosis of paralarvae: Mantle tubular and thin; head small, with statoliths clearly visible through posterior transparent tissue; neck transparent, chambered brachial pillar showing the inner central esophagus and muscular stripes; eyes oval or elongate (width slightly greater than lens diameter) with thick reflective tissue covering a distinct structure, possibly a photophore; funnel-locking cartilage oval with single antitragus.
The suggested common name, the ninja lanternshark, refers to the uniform black colouration and reduced photophore complement used as concealment in this species, somewhat reminiscent of the typical outfit and stealthy behaviour of a Japanese ninja," said Vasquez.
Photophore markings concentrated along sides of head and trunk, irregular on rest of body.
Among the mares confirmed in foal to Raven's Pass this year are Irish 1,000 Guineas winner Nightime, Wolf Cleugh (dam of Moss Vale) and Photophore, a half-sister to Elusive Wave.
Returning to medicine, with Dr Helot of Rouen, he developed a lightweight battery-powered forehead lamp, the 'photophore', for surgeons and dentists, then a portable electric safety lamp for miners, firemen and underwater divers in the Suez Canal.
Caption: In glass squid, five types of photophore cells (cross sections shown) plus a mixed cluster (far right) can produce different effects as they leak bioluminescent light.
Photophore terminology followed Parr (1929) and Nafpaktitis & Nafpaktitis (1969).
Adults are easily distinguishable from other ommastrephids by the presence of 2 long, luminous stripes that extend nearly the entire length of the ventral surface of the mantle; 2 paired external photophores on the anterior ventral edge of the mantle; a large photophore patch at the base of each arm IV; and a fused funnel/mantle-locking apparatus (Young & Vecchione 2009, Roper et al.
The sale also presents the chance to buy full-or half-sisters to Alandi (1244; Ayla, in foal to Dylan Thomas), Septimus (1306; Escolhida, in foal to Oratorio), Sequoyah (1314; Tu Eres Mi Amore, in foal to Araafa), Red Clubs (1446; Dance Club), Bushranger (1450; Becuille), Rafha (1554; Jazz Baby), Adlerflug (1625; Aloe, in foal to Manduro), and Elusive Wave (1664; Photophore, in foal to Elusive City).