| NOUN | time | Ordovician period, Ordovician | from 500 million to 425 million years ago |
|---|
| Meaning | From 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds. | |
|---|---|---|
| Synonym | Ordovician | |
| Instance of | period, geological period | A unit of geological time during which a system of rocks formed |
| Part of | Paleozoic, Paleozoic era | From 544 million to about 230 million years ago |
| Spanish | Ordoviciano, ordovícico | |
| Catalan | ordovicià | |
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