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[foh-tuh-trop-ik, -troh-pik] /ˌfoʊ təˈtrɒp ɪk, -ˈtroʊ pɪk/

adjective, Botany.
growing toward or away from the light.
taking a particular direction under the influence of light.


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  • Phototropy

    /ˌfəʊtəʊˈtrəʊpɪ/ noun (chem) 1. an alteration in the colour of certain substances as a result of being exposed to light of different wavelengths 2. the reversible loss of colour of certain dyestuffs when illuminated at a particular wavelength

  • Phototube

    [foh-tuh-toob, -tyoob] /ˈfoʊ təˌtub, -ˌtyub/ noun, Electronics. 1. an with a photosensitive cathode, used like a photocell. /ˈfəʊtəʊˌtjuːb/ noun 1. a type of photocell in which radiation falling on a photocathode causes electrons to flow to an anode and thus produce an electric current

  • Phototype

    [foh-tuh-tahyp] /ˈfoʊ təˌtaɪp/ noun, Printing. 1. a plate with a relief printing surface produced by photography. 2. any process for making such a plate. 3. a print made from it. /ˈfəʊtəʊˌtaɪp/ noun 1. verb 2. (transitive) to reproduce (an illustration) using a phototype

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