trichotomous

/traɪˈkɑtəməs/
adjective
  1. Divided into three parts, branches, or categories.
    • The decision tree was trichotomous, offering three possible outcomes at each step.
    • Their argument used a trichotomous classification: past, present, and future.
    • The biologist studied a trichotomous plant stem that split into three equal branches.
Antonyms
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