Dictionary of Human Evolution and Biology

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1. any of various processes or mechanisms employed by taxa during their evolution. The term was brought into popular usage by G. G. Simpson during discussions of tempo and mode of evolution.

2. in statistics, the value of the variate at which a relative or absolute maximum occurs in a frequency distribution; in a discrete sample, the most common value. Aka modal number.

3. any of the large Pleistocene-age large cutting tools: see mode 1 and mode 2.

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