[foh-tuh-trof, -trohf] /ˈfoʊ təˌtrɒf, -ˌtroʊf/

noun, Biology.
any organism that uses light as its principal source of energy.
an organism that obtains energy from sunlight for the synthesis of organic compounds
An organism that manufactures its own food from inorganic substances using light for energy. Green plants, certain algae, and photosynthetic bacteria are phototrophs. Also called photoautotroph.


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  • Phototropic

    [foh-tuh-trop-ik, -troh-pik] /ˌfoʊ təˈtrɒp ɪk, -ˈtroʊ pɪk/ adjective, Botany. 1. growing toward or away from the light. 2. taking a particular direction under the influence of light.

  • Phototropism

    [foh-to-truh-piz-uh m, foh-toh-troh-piz-uh m] /foʊˈtɒ trəˌpɪz əm, ˌfoʊ toʊˈtroʊ pɪz əm/ noun, Botany. 1. phototropic tendency or growth. /ˌfəʊtəʊˈtrəʊpɪzəm/ noun 1. the growth response of plant parts to the stimulus of light, producing a bending towards the light source 2. the response of animals to light; phototaxis n. 1899, from German phototropie (1892), from photo- […]

  • 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

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