1. diagram

noun. ['ˈdaɪəˌgræm'] a drawing intended to explain how something works; a drawing showing the relation between the parts.

Rhymes with Venn Diagram

2. diagram

verb. ['ˈdaɪəˌgræm'] make a schematic or technical drawing of that shows interactions among variables or how something is constructed.

3. Venn

noun. English logician who introduced Venn diagrams (1834-1923).