Meaning & use
Triassic
The geological period from about 252 to 201 million years ago, the first period of the Mesozoic era.
See it in a sentence
The earliest dinosaurs appeared during the Triassic period.
Fossils from the Triassic show some of the first mammal-like reptiles.
A note on using this word
Triassic is usually capitalized and most often paired with the noun period or era.
Words with a similar meaning
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