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English definition of “fractal”

fractal

noun [C] uk   /ˈfræk.təl/ specialized us  
a complicated pattern in mathematics built from simple repeated shapes that are reduced in size every time they are repeated: The way that the trunk of a tree divides into smaller and smaller branches and twigs is an approximate fractal pattern.
(Definition of fractal from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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