Definition of Permo–Triassic in English:

Permo–Triassic

Syllabification: Per·mo–Tri·as·sic
Pronunciation: /ˌpərmō ˌtrīˈasik
 
/

adjective

Geology
  • 1Of, relating to, or occurring at the boundary of the Permian and Triassic periods, about 245 million years ago. Mass extinctions occurred at this time, marking the end of the era.
  • 1.1Of or relating to the Permian and Triassic periods or rock systems considered as a unit.
  • 1.2 (as noun the Permo–Triassic or Permo–Trias) The Permian and Triassic periods together or the system of rocks deposited during them.

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Pronunciation: skəʊʃ
noun
a small amount; a little