obsidianus

== Latin == === Etymology === Named after Obsidius, who was, according to Pliny, the Roman who discovered the stone in Aethiopia. The more common nomen Obsius was used by Sillig, but the correct name was Obsidius. Both names are of Italic (Sabine/Samnite) origin and ultimately come from Proto-Italic *op(i)s, from Proto-Indo-European *h₃ep- (“to work, toil”) (compare the goddess Ops). === Pronunciation === (Classical Latin) IPA(key): [ɔp.sɪ.diˈaː.nʊs] (modern Italianate Ecclesiastical) IPA(key): [ob.si.diˈaː.nus] === Adjective === obsidiānus (feminine obsidiāna, neuter obsidiānum); first/second-declension adjective (relational) obsidian ==== Declension ==== First/second-declension adjective. === References === George Davis Chase, "The Origin of Roman Praenomina", in Harvard Studies in Classical Philology, vol. VIII (1897).