proterozoic

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US/ˌpɹoʊt(ə)ɹrəˈzoʊɪk/US/ˌpɹoʊt(ə)ɹoʊˈzoʊɪk/UK/ˌpɹɒt(ə)ɹəˈzəʊɪk/UK/ˌpɹɒt(ə)ɹəʊˈzəʊɪk/

adjective

Of or relating to the geologic eon from 2,500 Ma to 541.0±1.0 Ma.

Similar
early
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Meanings

proterozoic1

adjectiveproterozoic (not comparable)
  1. alternativenot comparableAlternative form of Proterozoic.

Proterozoic2

adjectiveProterozoic (not comparable)
  1. not comparablegeographyOf or relating to the geologic eon from 2,500 Ma to 541.0±1.0 Ma.
proper noun
  1. geographyThe eon from 2,500 Ma to 541.0±1.0 Ma, the beginning of the Phanerozoic, marked by the build up of oxygen in the atmosphere and the emergence of primitive multicellular life.

Synonyms & antonyms

adjectiveformed in the later of two divisions of the Precambrian era

Similar
early

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

From protero- + -zoic.

Full word history & related roots →

Translations

Chinese Mandarin 元古宙
  • 元古宙 (Yuángǔzhòu)eon 2,500-541 Ma
Czech starohory, proterozoikum
  • starohoryeon 2,500-541 Ma
  • proterozoikumeon 2,500-541 Ma
Dutch proterozoïcum
  • proterozoïcumeon 2,500-541 Ma
Estonian proterosoikum, aguaegkond
  • proterosoikumeon 2,500-541 Ma
  • aguaegkondeon 2,500-541 Ma
  • agueooneon 2,500-541 Ma
Finnish proterotsooinen, proterotsooinen aioni
  • proterotsooinenof eon from 2,500 to 541 million years ago
  • proterotsooinen aionieon 2,500-541 Ma
French protérozoïque, protérozoïque
  • protérozoïqueof eon from 2,500 to 541 million years ago
  • protérozoïqueeon 2,500-541 Ma
German proterozoisch, Proterozoikum
  • proterozoischof eon from 2,500 to 541 million years ago
  • Proterozoikumeon 2,500-541 Ma
Greek προτεροζωικός, Προτεροζωικός
  • προτεροζωικός (proterozoïkós)of eon from 2,500 to 541 million years ago
  • Προτεροζωικός (Proterozoïkós)eon 2,500-541 Ma
Hebrew פרוטרוזואיקאי, פרוטרוזואיקון
  • פרוטרוזואיקאי (proterozo'ikái)of eon from 2,500 to 541 million years ago
  • פרוטרוזואיקון (proterozo'ikón)eon 2,500-541 Ma
Hungarian proterozoikum
  • proterozoikumeon 2,500-541 Ma
Irish Prótarasóch
  • Prótarasóchof eon from 2,500 to 541 million years ago
Italian proterozoico, proterozoico
  • proterozoicoof eon from 2,500 to 541 million years ago
  • proterozoicoeon 2,500-541 Ma
Japanese 原生代
  • 原生代 (Genseidai)eon 2,500-541 Ma
Norwegian proterzoikum
  • proterzoikumeon 2,500-541 Ma
Polish proterozoik
  • proterozoikeon 2,500-541 Ma
Portuguese proterozoico, Proterozoico
  • proterozoicoof eon from 2,500 to 541 million years ago
  • Proterozoicoeon 2,500-541 Ma
Russian протерозо́йский, протерозо́й
  • протерозо́йский (protɛrozójskij)of eon from 2,500 to 541 million years ago
  • протерозо́й (protɛrozój)eon 2,500-541 Ma
Spanish Proterozoico, Proterozoico
  • Proterozoicoof eon from 2,500 to 541 million years ago
  • Proterozoicoeon 2,500-541 Ma

Rhymes & wordplay

Rhymes with proterozoic

heroicstoicMesozoicpaleozoicCenozoicanechoicphanerozoiczoicAnthropozoicholozoicpreheroic
All rhymes →
Cite this entry
APA

proterozoic. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/proterozoic

MLA

“proterozoic.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/proterozoic. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “proterozoic,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/proterozoic.

Source: proterozoic on Wiktionary, CC BY-SA 4.0.