1. of, relating to, or presented in the form of a diagram; shown by means of a diagram
Usage: formal; technical

Examples

• The engineer provided a diagrammatical representation of the building's electrical system.
• A diagrammatical approach helped students understand the complex molecular structure.
• The report included diagrammatical illustrations to clarify the data.
• The instructions were presented in a diagrammatical format for clarity.
• The diagrammatical layout made it easier to follow the workflow.