Definition of polygonial in English:

polygonial

Pronunciation /ˌpɒlɪˈɡəʊnɪəl/

adjective

  • Polygonal.

Origin

Early 18th century; earliest use found in Joseph Moxon (1627–1691), printer and globe maker. From Hellenistic Greek πολυγώνιος polygonal (from ancient Greek πολύγωνον + -ιος, suffix forming adjectives) + -al.