illustration

(noun) artwork that helps make something clear or attractive.

(noun) showing by example. Synonyms: exemplification.

(noun) an item of information that is typical of a class or group. Synonyms: example, instance, representative. Examples: "This patient provides a typical example of the syndrome." "There is an example on page 10."

(noun) a visual representation (a picture or diagram) that is used make some subject more pleasing or easier to understand.