Definition of Hadean in English :

Define Hadean in English

Hadean meaning in English

Meaning of Hadean in English

Pronunciation of Hadean in English

Hadean pronunciation in English

Pronounce Hadean in English


see synonyms of hadean


1. hadean, hadean aeon, hadean eon, hadean time, priscoan, priscoan aeon, priscoan eon

the earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago); no evidence of life


2. hadean, plutonian, tartarean

of or relating to or characteristic of Hades or Tartarus

WordNet Lexical Database for English. Princeton University. 2010.


see synonyms of hadean
[sometimes h-]
designating or of the time before rocks formed on the Earth, which was then a molten mass, and when the solar system was forming

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.


see synonyms of hadean
Of, relating to, or being the period of time during which Earth formed, from the start of the solar system (4.6 billion years ago) until accretion, impact, and cooling led to stable Earth-Moon orbits and the formation of the earliest rocks on Earth (3.8 billion years ago). See Table at geologic time.

The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.