Latin

Adjective

septangulus m ‎(feminine septangula, neuter septangulum); first/second declension

1. heptagonal
   • 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

• Félix Gaffiot (1934), “septangulus”, in Dictionnaire Illustré Latin-Français, Paris: Hachette.
• septangulus in Ramminger, Johann (accessed 16 July 2016) Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700, pre-publication website, 2005-2016