Triassic period

/traɪˌæsɪk ˌpɪriəd/
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Other forms: Triassic periods

Definitions of Triassic period
  1. noun
    the period of geologic time from approximately 252 to 201 million years ago; the first period of the Mesozoic era
    synonyms: Triassic
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    example of:
    geological period, period
    a unit of geological time during which a system of rocks formed
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