Definition of photonegative in English:

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photonegative

Pronunciation: /fəʊtəʊˈnɛɡətɪv/

adjective

1 Biology (Of an organism) tending to move away from light.
Example sentences
  • Species commonly initiate strongly photonegative swimming when the intensity of light decreases, such as would occur when a predator passes overhead; the behavior is known as the ‘shadow response.’
  • Homozygous ß3 mutant larvae were also photonegative, but hemizygous ß3 mutant larvae were photoneutral.
2 Physics (Of a substance) exhibiting a decrease in electrical conductivity under illumination.
Example sentences
  • In this process, photonegative materials will be removed while photopositive materials remain in the final device.
  • This form of dielectric, in one aspect, is a photonegative paste.
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