Definition of Triassic in English:

Triassic

adjective

Geology
  • 1Relating to or denoting the earliest period of the Mesozoic era, between the Permian and Jurassic periods.

    • ‘Triassic footprints were primarily made by early crocodilians and small dinosaurs.’
    • ‘Triassic asteroids are among the rarest of fossils, hitherto comprised of only three genera, all from Europe.’
    1. 1.1as noun the Triassic" or "the Trias The Triassic period or the system of rocks deposited during it.
      • ‘Such sites are found in numerous strata of different ages throughout the triassic, jurassic and cretaceous, all of which were allegedly laid down during the flood.’

Origin

Mid 19th century: from late Latin trias (see triad), because the strata are divisible into three groups, + -ic.

Pronunciation:

Triassic

/trīˈasik/