Definition of orthoceratite in English:

orthoceratite

(also orthoceratites)

noun

  • A fossil shell of a nautiloid cephalod mollusc of the Palaeozoic or early Mesozoic eras, having a long, straight (or nearly straight) chambered shell; specifically a member of the former genus Orthoceratites or family Orthoceratidae; compare orthoceras. Also in Latin form Orthoceratites (in later use only as the name of a genus).

Origin

Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. From post-classical Latin Orthoceratites from ancient Greek ὀρθο- ortho- + κερατ-, κέρας horn + -ίτης -ite.

Pronunciation

orthoceratite

/ˌɔːθə(ʊ)ˈsɛrətʌɪt/