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 asteroids are among the rarest of fossils, hitherto comprised of only three genera, all from Europe.’
    • ‘Triassic footprints were primarily made by early crocodilians and small dinosaurs.’
    1. 1.1The 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/