Latin

Adjective

quinquangulus m ‎(feminine quinquangula, neuter quinquangulum); first/second declension

1. pentagonal
   • 1611, Johannes Kepler, Strena seu De Niva Sexangula, p. 5:

     Nam si casu fit, cur non aeque quinquangula cadunt, aut septangula, cur semper sexangula, siquidem nondum confusa et glomerata multitudine, variogue impulsu, sed sparsa et distincta?

     For if it happens by chance, why do they not fall equally pentagonal, or heptagonal, why always hexagonal, if in fact they are never mixed and heaped in a great number, and by different impact, but sparse and distinct?

Inflection

First/second declension.

References

• quinquangulus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• QUINQUANGULUS in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• Félix Gaffiot (1934), “quinquangulus”, in Dictionnaire Illustré Latin-Français, Paris: Hachette.