proterozoic

Fetched 2026-10-26 (cache).

Synonyms: protozoic

Antonyms: protozoic

Related words from Datamuse; suggestions, not definitions.

Adjective

1. {{lb|en|geology}} Of or relating to the [[geologic]] [[eon]] from 2,500 [[Ma]] to 541.0±1.0 Ma.

Proper noun

1. {{lb|en|geology}} 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]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.