Definitions

1. adjective

relating to or denoting the Cambrian Period, a geologic period from about 541 to 485 million years ago.

“The fossils found in the rock were from the Cambrian era.”

2. noun

a person or thing from or related to the Cambrian Period.

“The paleontologist studied the Cambrian fossils for years.”

3. noun

the Cambrian Period itself.

“The Cambrian is often considered the most important period in Earth’s history.”