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    extinction
    /ɪkˈstɪŋ(k)ʃn/

    noun

    • 1. the fact or process of a species, family, or other group of animals or plants becoming extinct: "preventing the extinction of this unique frog will require the restoration of ponds and surrounding habitats"
    • 2. reduction to zero in the intensity of light or other radiation as it passes through a medium, due to absorption, reflection, or scattering: "ultraviolet extinction"

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