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Triassic

Tri·as·sic

Triassic

 
pronunciation:
traI ae sihk
parts of speech:
adjective, noun
part of speech: adjective
definition: of, relating to, or designating the first geological period of the Mesozoic Era, from approximately 220 million to 180 million years ago, when volcanic activity was prominent and many reptiles, including the dinosaurs, appeared.
 
part of speech: noun
definition: the Triassic Period, or the rock formations that date from that time.