Standard Lemma guide

Proterozoic

adj · name · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • US: /ˌpɹoʊt(ə)ɹrəˈzoʊɪk/
  • US: /ˌpɹoʊt(ə)ɹoʊˈzoʊɪk/
  • UK: /ˌpɹɒt(ə)ɹəˈzəʊɪk/
  • UK: /ˌpɹɒt(ə)ɹəʊˈzəʊɪk/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -əʊɪk

1

adj

Meaning 1

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

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: geography, geology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Alternative form of Proterozoic.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative, not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

name

Meaning 3

The 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.

Definition source: English Wiktionary via Wiktextract

Topics: geography, geology, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: Precambrian

4

adjective satellite

Meaning 4

formed in the later of two divisions of the Precambrian era

Definition source: Princeton WordNet 3.0

Examples

  • proterozoic life forms

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Proterozoic eon, Proterozoic aeon

Antonyms: none provided

Broader terms: eon, aeon

History

Etymology

From protero- + -zoic.

Across languages

Translations

37 source translations are retained for this English entry.

  • Finnish: proterotsooinen — of eon from 2,500 to 541 million years ago
  • French: protérozoïque — of eon from 2,500 to 541 million years ago
  • German: proterozoisch — of eon from 2,500 to 541 million years ago
  • Greek: προτεροζωικός (proterozoïkós) — of eon from 2,500 to 541 million years ago
  • Hebrew: פרוטרוזואיקאי (proterozo'ikái) — of eon from 2,500 to 541 million years ago
  • Irish: Prótarasóch — of eon from 2,500 to 541 million years ago
  • Italian: proterozoico — of eon from 2,500 to 541 million years ago
  • Mongolian: анх төрмөлийн (anx törmöliin) — of eon from 2,500 to 541 million years ago
  • Mongolian: анхны (anxny) — of eon from 2,500 to 541 million years ago
  • Portuguese: proterozoico — of eon from 2,500 to 541 million years ago
  • Russian: протерозо́йский (protɛrozójskij) — of eon from 2,500 to 541 million years ago
  • Spanish: Proterozoico — of eon from 2,500 to 541 million years ago
  • Tibetan: གདོད་མའི་སྲོག་ལྡན (gdod ma'i srog ldan) — of eon from 2,500 to 541 million years ago
  • Tibetan: གདོད་མའི་སྲོག་ལྡན་ཆགས་རིམ་གྱི (gdod ma'i srog ldan chags rim gyi) — of eon from 2,500 to 541 million years ago
  • Chinese Mandarin: 元古宙 (Yuángǔzhòu) — eon 2,500-541 Ma
  • Czech: starohory — eon 2,500-541 Ma
  • Czech: proterozoikum — eon 2,500-541 Ma
  • Dutch: proterozoïcum — eon 2,500-541 Ma
  • Estonian: proterosoikum — eon 2,500-541 Ma
  • Estonian: aguaegkond — eon 2,500-541 Ma
  • Estonian: agueoon — eon 2,500-541 Ma
  • Finnish: proterotsooinen aioni — eon 2,500-541 Ma
  • French: protérozoïque — eon 2,500-541 Ma
  • German: Proterozoikum — eon 2,500-541 Ma
  • Greek: Προτεροζωικός (Proterozoïkós) — eon 2,500-541 Ma
  • Hebrew: פרוטרוזואיקון (proterozo'ikón) — eon 2,500-541 Ma
  • Hungarian: proterozoikum — eon 2,500-541 Ma
  • Italian: proterozoico — eon 2,500-541 Ma
  • Japanese: 原生代 (Genseidai) — eon 2,500-541 Ma
  • Polish: proterozoik — eon 2,500-541 Ma
  • Portuguese: Proterozoico — eon 2,500-541 Ma
  • Russian: протерозо́й (protɛrozój) — eon 2,500-541 Ma
  • Serbo-Croatian: протерозо̀ик — eon 2,500-541 Ma
  • Serbo-Croatian: алгонкиј — eon 2,500-541 Ma
  • Serbo-Croatian: proterozòik — eon 2,500-541 Ma
  • Serbo-Croatian: algonkij — eon 2,500-541 Ma
  • Spanish: Proterozoico — eon 2,500-541 Ma
Real reading context

Proterozoic in complete knowledge articles