Proterozoic
"Proterozoic" in Russian
протерозо́йский
protɛrozójskij
(of eon from 2,500 to 541 million years ago)
протерозо́й
protɛrozój
(eon 2,500-541 Ma)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.