subinterval

/sʌbˈɪntərvəl/
noun
  1. A smaller interval that is part of a larger interval, especially in mathematics, time, or data analysis.
    • The graph was broken into subintervals to analyze changes in temperature over time.
    • Each subinterval of the experiment was recorded separately for accuracy.
    • The teacher divided the number line into subintervals to help students understand fractions.
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