Definitions

1. adjective

Pertaining to or characteristic of the Triassic period, a geologic period that occurred from about 252 million to 201 million years ago.

“The Triassic fossils found in the rock formations were from a period of great upheaval in the Earth’s history.”

2. noun

A geologic period that occurred from about 252 million to 201 million years ago, characterized by the appearance of dinosaurs and the first modern coral reefs.

“The Triassic period is often divided into three sub-periods: the Early Triassic, the Middle Triassic, and the Late Triassic.”