illustrative

This term describes something that makes a complex idea easier to understand by providing a concrete instance or a visual aid. It carries a positive connotation of clarity and enlightenment, often used in academic, legal, or technical contexts to signal that a specific example is being used to represent a broader rule. While it can refer to the presence of actual images or diagrams, it more frequently describes the logical function of an example. It differs from "descriptive" in that it does not just detail a subject but actively serves as a tool for explanation or proof.