adjective Date: 1914 exhibiting positive phototropism or phototaxis

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • photopositive — [fōt΄ō päz′ə tiv] adj. Biol. responding positively to light, as a moth does …   English World dictionary

  • photopositive — /foh teuh poz i tiv/, adj. Physics. pertaining to a substance whose conductivity increases upon absorption of electromagnetic radiation. [1910 15; PHOTO + POSITIVE] * * * …   Universalium

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

  • photopositive — adj. increasing conductivity after absorbing electromagnetic radiation (Physics) …   English contemporary dictionary

  • photopositive — adjective 1》 Biology (of an organism) tending to move towards light. 2》 Physics (of a substance) increasing in electrical conductivity under illumination …   English new terms dictionary

  • photopositive — pho·to·positive …   English syllables

  • photopositive — “+ adjective Etymology: phot + positive : exhibiting positive phototropism or phototaxis …   Useful english dictionary

  • Lumbricus rubellus — Taxobox name = Red earthworm image caption = L. rubellus image width = 250px regnum = Animalia phylum = Annelida classis = Clitellata subclassis = Oligochaeta ordo = Haplotaxida familia = Lumbricidae genus = Lumbricus species = L. rubellus… …   Wikipedia

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

  • pigment printing —    A photographic printing method, in which a halftone picture results from pigments embedded in gelatin. The primary material is a paper called pigment paper , a paper coated with a mixture of gelatin and pigment. The paper is made light… …   Glossary of Art Terms

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