411 REFERENCE · Wiktionary
Orosirian
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Adjective
-
en geology Of a geologic period within the Paleoproterozoic era from about 2050 to 1800 million years ago.
Proper noun
en geology The Orosirian period.
Translations
Orosirian period
Estonian: et orosir
Greek: el Οροσίρια f
See also
Appendix:Geologic timescale