photonegativen.adj.2
/ˌfəʊtəʊˈnɛɡətɪv/, U.S. /ˌfoʊdoʊˈnɛɡədɪv/ A. n.
A photographic negative; = negative n. 7a.
ΘΚΠ
society > leisure > the arts > visual arts > photography > a photograph > [noun] > showing reversed light and shade
negative1841
neg1874
cloud negative1892
photonegative1941
reduction negative1945
1941 J. W. Bagley Aerophotogr. & Aerosurv. v. 108 Photonegatives are classified in several respects: as underexposed, normal, or overexposed; as contrasty, normal, or flat, [etc.].
1965 Current Anthropol. 6 496/2 Library of about 16,600 volumes.., file of about 82,000 photonegatives, slides and films.
1986 W. L. Schweber Integrated Circuits for Computers i. 15 A photonegative or mask of the circuit..is exposed onto the surface of a wafer that has been coated with photoresist.
2000 Courier-Post (Cherry Hill, New Jersey) (Nexis) 17 Oct. 26 Linotype letter blocks have been replaced by a photonegative printed from the computer.
B. adj.2
Of the nature of or resembling a photographic negative.
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society > leisure > the arts > visual arts > photography > a photograph > [adjective] > showing reversed light and shade
negative1840
photonegative1983
1983 N.Y. Times (Nexis) 6 Feb. vi. 27/1 Her narration is illustrated on the screen by a photonegative image of the Statue of Liberty overlapping a film of the American flag spinning around and around in a clothes dryer.
2004 PC World (Nexis) 3 Feb. 28 The screens on all the units here exhibit washed-out colors and photonegative effects when viewed even slightly off-axis.
This is a new entry (OED Third Edition, March 2006; most recently modified version published online March 2022).
photonegativeadj.1
/ˌfəʊtəʊˈnɛɡətɪv/, U.S. /ˌfoʊdoʊˈnɛɡədɪv/ 1. Zoology. Of an animal: tending to move away from light.
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the world > animals > by habits or actions > [adjective] > photonegative
photonegative1914
1914 S. O. Mast in Biol. Zentralblatt 34 662 In place of positively or negatively phototropic, geotropic, etc., we might use photo-, geo-, negative or positive, etc.
1919 Proc. National Acad. Sci. U.S.A. 5 497 Chiton exhibits precise phototropic orientations. The younger individuals are photonegative, the older ones photopositive, to sunlight.
1945 T. H. Savory Spiders Brit. Isles (ed. 2) 143 They [sc. harvestmen] are strongly photonegative and collect in the darkest corner of their cage.
1997 G. S. Helfman et al. Diversity of Fishes ix. 129/1 Atlantic salmon larvae... A general geopositive and photonegative response, moving them down and away from light, keeps them buried.
2. Physics. Relating to or exhibiting a decrease in electrical conductivity under illumination.
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the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > [adjective] > relating to photoconduction
photonegative1915
photopositive1915
photoconducting1924
photoconductive1929
1915 Physical Rev. 5 62 For certain regions of the spectrum these cells were photo-negative, while for longer wave-lengths they were photo-positive.
1932 A. L. Hughes & L. A. DuBridge Photoelectr. Phenomena viii. 328 Occasionally it is found that light apparently diminishes the conductivity (the photonegative effect).
2002 Proc. SPIE (Internat. Soc. Optical Engin.) 4935 407 By photo-sensitizing the surface controlled negative impedance transistor (NEGIT), we can get a novel photo-negative resistance device.
This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).
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n.adj.21941adj.11914