proterozoic

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
  2. adjective formed in the later of two divisions of the Precambrian era

In classic literature

Synonyms

Proterozoic eon, Proterozoic aeon

A single word — an entire dictionary opens.

Type a word, a sentence, a book title, or a link to an English article. WordNet and the Classics answer.

Try

A library of classics · a vault of words · instant etymology & meaning

Continue reading