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A polychotomy (päl′i kät′ə mē; plural polychotomies) is a division or separation into many parts or classes. Polychotomy is a generalization of dichotomy, which is a polychotomy of exactly two parts. In evolutionary biology, the term polychotomy can also be considered a historically based misspelling of polytomy.[1]

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  1. ^ Weiss, David J. (1995). “Polychtomous or Polytomous?,” Applied Psychological Measurement, Vol. 19, No. 1, p. 4

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