dans le dictionnaire PONS
ir·regu·lar·ity [ɪˌregjəˈlærəti, Am -ˈlerət̬i] SUBST
1. irregularity form (lack of symmetry):
- irregularity of an arrangement
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- irregularity of an arrangement
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- irregularity of prices
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- irregularity of a surface, terrain
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2. irregularity (intermittence):
- irregularity of intervals
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- irregularity of intervals
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