Orthoceras

noun

Or·​thoc·​er·​as

ȯ(r)ˈthäsərəs

: an ill-defined genus of extinct nautiloid cephalopod mollusks having a long tapering shell that is nearly or quite straight, almost smooth, and many-chambered

Word History

Etymology

New Latin, from orth- + -ceras

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Rhymes for Orthoceras

• cordilleras