photonegative
adjective Date: 1914 exhibiting negative phototropism or phototaxis

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • photonegative — [fōt΄ō neg′ə tiv] adj. Biol. responding negatively to light, as an earthworm does …   English World dictionary

  • photonegative — /foh teuh neg euh tiv/, adj. Physics. pertaining to a substance, as selenium, having a conductivity that decreases upon absorption of electromagnetic radiation. [1910 15; PHOTO + NEGATIVE] * * * …   Universalium

  • photonegative — adjective having a negative phototropic or phototactic response; repelled by light Ant: photopositive …   Wiktionary

  • photonegative — adj. having decreased conductivity upon absorption of electromagnetic radiation (Physics) …   English contemporary dictionary

  • photonegative — adjective 1》 Biology (of an organism) tending to move away from light. 2》 Physics (of a substance) exhibiting a decrease in electrical conductivity under illumination …   English new terms dictionary

  • photonegative — pho·to·negative …   English syllables

  • photonegative — |fōd.(ˌ)ō+ adjective Etymology: phot + negative : exhibiting negative phototropism or phototaxis …   Useful english dictionary

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