Siderian en · ADJ
Pronunciation
- sɪ-/
- /saɪˈdɪəri.ən
Etymology
From Greek sideros.
Meanings
- Of a geologic period within the Paleoproterozoic era from about 2500 to 2300 million years ago.
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| most Siderian | Degree=Sup | lexicographic | |
| more Siderian | Degree=Cmp | lexicographic |