| NOUN | time | Paleozoic era, Paleozoic | from 544 million to about 230 million years ago |
|---|
| Meaning | From 544 million to about 230 million years ago. | |
|---|---|---|
| Synonym | Paleozoic | |
| Instance of | era, geological era | A major division of geological time |
| Parts | Cambrian, Cambrian period | From 544 million to about 500 million years ago |
| Carboniferous, Carboniferous period | From 345 million to 280 million years ago | |
| Devonian, Devonian period, Age of Fishes | From 405 million to 345 million years ago | |
| Ordovician, Ordovician period | From 500 million to 425 million years ago | |
| Permian, Permian period | From 280 million to 230 million years ago | |
| Silurian, Silurian period | From 425 million to 405 million years ago | |