exemplum

noun2

1. •
   An example.

   • In addition, if study of remodeled versus active lesions, or lesions of different grades of severity was germane to a work, photographs of exempla should be presented so readers can evaluate them. — 2023
2. •
   (rhetoric, literary) A story demonstrating a moral point; a parable.

   • In the Middle Ages preachers had enlivened their sermons with exempla – edifying tales of judgements upon sinners and mercies shown to the pious. — 1971