Standard Lemma guide

Mesoproterozoic

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

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1

adj

Meaning 1

Of a geologic era within the Proterozoic eon; comprises the Calymmian, Ectasian and Stennian periods from about 1600 to 900 million years ago, when the Rodinia supercontinent was formed.

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 Mesoproterozoic era.

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

Etymology tree Proto-Indo-European *me Proto-Indo-European *dheh1-? Proto-Indo-European *-dhe Proto-Indo-European *médhi Proto-Indo-European *-os Proto-Indo-European *médhyos Proto-Hellenic *métsos Ancient Greek μέσος (mésos)der. English meso- English Proterozoic English Mesoproterozoic From meso- + Proterozoic.

Across languages

Translations

8 source translations are retained for this English entry.

  • Finnish: keskiproterotsooinen — Mesoproterozoic era
  • Finnish: mesoproterotsooinen — Mesoproterozoic era
  • Greek: μεσοπροτεροζωικός (mesoproterozoïkós) — Mesoproterozoic era
  • Estonian: mesoproterosoikum — Mesoproterozoic era
  • Finnish: keskiproterotsooinen maailmankausi — Mesoproterozoic era
  • Finnish: mesoproterotsooinen maailmankausi — Mesoproterozoic era
  • Greek: Μεσοπροτεροζωικός (Mesoproterozoïkós) — Mesoproterozoic era
  • Russian: мезопротерозо́й (mezoproterozój) — Mesoproterozoic era