extinction
noun
[ ɪkˈstɪŋ(k)ʃ(ə)n ]
• 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"
• 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"
Origin:
late Middle English: from Latin exstinctio(n- ), from exstinguere ‘quench’ (see extinguish).
