Help Wordnik hunt for a million missing words by backing our Kickstarter!


from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The period of time covering the physical formation and development of Earth, especially the period prior to human history.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the time of the physical formation and development of the earth (especially prior to human history)


Sorry, no etymologies found.


Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.