diagrammatical

/ˌdaɪəɡrəˈmætɪkəl/
adjective
  1. Relating to or expressed in the form of a diagram; diagrammatic.
    • The textbook uses a diagrammatical approach to teach geometry.
    • A diagrammatical map of the subway system is posted at every station.
    • His diagrammatical notes helped the team understand the workflow.
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