LATIN DICTIONARYLexicon Latīnum
adjectivefirst/second-declension adjective

septangulus

septangulus (feminine septangula, neuter septangulum)
Classical[sɛpˈtaŋ.ɡʊ.ɫʊs]Ecclesiastical[sepˈtaŋ.ɡu.lus]

Meaning

  1. adjectiveheptagonal
    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?1611, Johannes Kepler, Strena seu De Niva Sexangula, page 5:

Declension

singular
formmasculinefeminineneuter
nominativeseptangulusseptangulaseptangulum
genitiveseptangulīseptangulaeseptangulī
dativeseptangulōseptangulaeseptangulō
accusativeseptangulumseptangulamseptangulum
ablativeseptangulōseptangulāseptangulō
vocativeseptanguleseptangulaseptangulum
plural
formmasculinefeminineneuter
nominativeseptangulīseptangulaeseptangula
genitiveseptangulōrumseptangulārumseptangulōrum
dativeseptangulīsseptangulīsseptangulīs
accusativeseptangulōsseptangulāsseptangula
ablativeseptangulīsseptangulīsseptangulīs
vocativeseptangulīseptangulaeseptangula

Origins

  1. Proto-Afroasiatic*sṗɣ?
  2. Proto-Semitic*šabʕ-bor.?
  3. Proto-Indo-European*septḿ̥
  4. Proto-Italic*septəm
  5. Latinseptangulus

Proto-Indo-European *h₂eng- Proto-Indo-European *h₂engulos Proto-Italic *angulos Latin angulus Latin septangulus From septem (“seven”) + angulus (“angled”).

Quick answers

What does septangulus mean in Latin?
septangulus, a adjective, means “heptagonal”.
How do you pronounce septangulus?
In classical Latin, [sɛpˈtaŋ.ɡʊ.ɫʊs]; in ecclesiastical (church) Latin, [sepˈtaŋ.ɡu.lus].
Where does septangulus come from?
Proto-Afroasiatic *sṗɣ? → Proto-Semitic *šabʕ-bor.? → Proto-Indo-European *septḿ̥ → Proto-Italic *septəm → Latin septangulus.