Synonyms of proterozoic

Noun

1. Proterozoic, Proterozoic eon, Proterozoic aeon

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

Adjective

1. proterozoic, early (vs. middle) (vs. late)

usage: formed in the later of two divisions of the Precambrian era; "proterozoic life forms"

Definition and meaning of proterozoic (Dictionary)