adjective Tri·as·sic \trī-ˈa-sik\

Definition of Triassic

  1. :  of, relating to, or being the earliest period of the Mesozoic era or the corresponding system of rocks marked by the first appearance of the dinosaurs — see geologic time table



Origin and Etymology of triassic

International Scientific Vocabulary, from Latin trias triad; from the three subdivisions of the European Triassic — more at triad

First Known Use: 1841

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