Neoproterozoic

Ne·o·prot·er·o·zo·ic

 (nē′ō-prŏt′ər-ə-zō′ĭk, -prō′tər-)

adj.

Of, relating to, or being the most recent of the three eras of the Proterozoic Eon, from approximately 1.0 billion to 542 million years ago, marked by the formation of extensive glaciers reaching as far south as the equator and the first appearance of multicellular life. See Table at geologic time.

n.

The Neoproterozoic Era.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Translations

Néoprotérozoïque