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a lungfish of either of two genera, Ceratodus or Neoceratodus, having hornlike ridges on the teeth.
Historical Examples

noun (pl) -duses
any of various extinct lungfish constituting the genus Ceratodus, common in Cretaceous and Triassic times Compare barramunda


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    hornlike; horny. adjective having the shape or texture of animal horn

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  • Ceratopsian

    any of several four-footed, herbivorous dinosaurs of the suborder Ceratopsia, of the late Cretaceous Period, having an enlarged skull with a beak, a large perforated frill at the back, and, in some species, one or three horns. ceratopsian (sěr’ə-tŏp’sē-ən) Any of various dinosaurs of the group Ceratopsia of the late Jurassic and Cretaceous Periods. Ceratopsians […]

  • Ceratopsid

    noun, adjective any dinosaur of the family Ceratopsidae, which includes the triceratops, having skull frills and massive horns Word Origin 1902

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