Definition of Orosirian

1. Adjective. (geology) Of a geologic period within the Paleoproterozoic era from about 2050 to 1800 million years ago. ¹



2. Proper noun. (geology) The Orosirian period. ¹

¹ Source: wiktionary.com

Orosirian Pictures

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Lexicographical Neighbors of Orosirian

Ornithogalum pyrenaicum
Ornithogalum thyrsoides
Ornithogalum umbellatum
Ornithomimida
Ornithonyssus
Ornithorhynchidae
Ornithorhynchus anatinus
Oro
Orobanchaceae
Oromos
Orono
Orontes
Orontium
Orontium aquaticum
Orosirian (current term)
Oroya fever
Orozco
Orphean
Orpheus
Orphic
Orphism
Orpington
Orr
Orrin
Orsamål
Orsi-Grocco method
Orson Welles
Ortalis
Ortega

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