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Linguistics. a structural representation of a sentence in the form of an inverted tree, with each node of the tree labeled according to the phrasal constituent it represents.


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  • Photoreceptor cell

    photoreceptor cell n.

  • Photorecon

    [foh-toh-ri-kon] /ˌfoʊ toʊ rɪˈkɒn/ noun, adjective, Informal. 1. .

  • Photoreceptor

    [foh-toh-ri-sep-ter] /ˌfoʊ toʊ rɪˈsɛp tər/ noun, Physiology, Biology. 1. a stimulated by light. /ˌfəʊtəʊrɪˈsɛptə/ noun 1. (zoology, physiol) a light-sensitive cell or organ that conveys impulses through the sensory neuron connected to it photoreceptor pho·to·re·cep·tor (fō’tō-rĭ-sěp’tər) n. A nerve ending, cell, or group of cells specialized to sense or receive light. photoreceptor (fō’tō-rĭ-sěp’tər)

  • Photoreception

    [foh-toh-ri-sep-shuh n] /ˌfoʊ toʊ rɪˈsɛp ʃən/ noun 1. the physiological perception of light. photoreception pho·to·re·cep·tion (fō’tō-rĭ-sěp’shən) n. The detection, absorption, and use of light, as for vision in animals or phototropism and photosynthesis in plants. pho’to·re·cep’tive (-tĭv) adj.

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