noun Pin·a·coc·er·as \ˌpinəˈkäsərəs\

Definition of Pinacoceras

  1. :  a genus (the type of the family Pinacoceratidae) of compressed involute ammonites with the most highly complicated suture known

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Origin and Etymology of pinacoceras

New Latin, from pinac- + -ceras

Seen and Heard

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feeling or affected by lethargy

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