Definition of orthoceras in English:

orthoceras

noun ɔːˈθɒsəras

A fossil orthoconic shell of a nautiloid cephalopod mollusc of the Palaeozoic or early Mesozoic eras; specifically a member of the genus Orthoceras.

Origin

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

Definition of orthoceras in US English:

orthoceras

nounɔːˈθɒsəras

A fossil orthoconic shell of a nautiloid cephalopod mollusc of the Palaeozoic or early Mesozoic eras; specifically a member of the genus Orthoceras.

Origin

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

词汇	orthoceras
释义	Definition of orthoceras in English: orthoceras noun ɔːˈθɒsəras A fossil orthoconic shell of a nautiloid cephalopod mollusc of the Palaeozoic or early Mesozoic eras; specifically a member of the genus Orthoceras. Origin Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. From post-classical Latin Orthoceras from ancient Greek ὀρθο- ortho- + κέρας horn. Definition of orthoceras in US English: orthoceras nounɔːˈθɒsəras A fossil orthoconic shell of a nautiloid cephalopod mollusc of the Palaeozoic or early Mesozoic eras; specifically a member of the genus Orthoceras. Origin Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. From post-classical Latin Orthoceras from ancient Greek ὀρθο- ortho- + κέρας horn.
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