Standard Lemma guide

Eoarchean

adj · name · 2 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.

  • Received-Pronunciation: /ˌiːəʊ.ɑːˈkiːən/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • General-American: /ˌiːoʊ.ɑɹˈkiːən/

1

adj

Meaning 1

Of a geologic era within the Archaean eon from about 4600 to 3600 million years ago; the first single-celled life began at this time.

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

name

Meaning 2

The era from 4,000 Ma to 3,600 Ma.

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

History

Etymology

No etymology was provided for this word.

Across languages

Translations

8 source translations are retained for this English entry.

  • Finnish: esiarkeeinen — of geologic era from 4,600 to 3,600 million years ago
  • Finnish: eoarkeeinen — of geologic era from 4,600 to 3,600 million years ago
  • Greek: ηωαρχαιοζωικός (ioarchaiozoïkós) — of geologic era from 4,600 to 3,600 million years ago
  • Estonian: eoarhaikum — era 4,000-3,600 Ma
  • Finnish: esiarkeeinen maailmankausi — era 4,000-3,600 Ma
  • Finnish: eoarkeeinen maailmankausi — era 4,000-3,600 Ma
  • Greek: Ηωαρχαιοζωικός (Ioarchaiozoïkós) — era 4,000-3,600 Ma
  • Russian: эоархе́й (eoarxéj) — era 4,000-3,600 Ma