1872, in the meaning defined at sense 1
Time Traveler for Archean
See more words from the same year
Cite this Entry
“Archean.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Archean. Accessed 5 Dec. 2021.
More from Merriam-Webster on Archean
Nglish: Translation of Archean for Spanish Speakers
See Definitions and Examples »
Get Word of the Day daily email!
Difficult Spelling Words Quiz
Test your vocabulary with our 10-question quiz!
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Top 10 Latin Phrases
Don't argue with the dictionary
This is usage
A simple trick to keep them separate
How 'literally' can mean "figuratively"
How to use a word that (literally) drives some pe...
The awkward case of 'his or her'
How many do you know?
Take the quiz