Definitions for hadeanheɪˈdi ən, ˈheɪ di ən
This page provides all possible meanings and translations of the word hadean
Random House Webster's College Dictionary
(in Greek myth) the underworld inhabited by the spirits of the dead.
the ancient Greek god ruling over the underworld.
(in the Revised Version of the New Testament) the abode of the dead.
(often l.c.) hell.
Ha•de•anheɪˈdi ən, ˈheɪ di ən(adj.)
Hadean, Hadean time, Hadean eon, Hadean aeon, Priscoan, Priscoan eon, Priscoan aeon(adj)
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
Hadean, Plutonian, Tartarean(adj)
of or relating to or characteristic of Hades or Tartarus
The Hadean eon.
Of, or relating to the geologic eon from about 4,600 to 3,800 million years ago; marked by the formation of the solar system, a stable Earth-Moon orbit and the first rocks.
Origin: From ᾍδης
The Hadean is the first geologic eon of Earth and lies before the Archean. It began with the formation of the Earth about 4600 million years ago and ended as defined by the ICS 4,000 million years ago. The name "Hadean" derives from Hades, the Greek name for the god of the underworld. The name is in reference to the "hellish" conditions on Earth at the time: the planet had just formed and was still very hot due to high volcanism, a partially molten surface and frequent collisions with other Solar System bodies. The geologist Preston Cloud coined the term in 1972, originally to label the period before the earliest-known rocks on Earth. W. Brian Harland later coined an almost synonymous term: the "Priscoan period". Other, older texts simply refer to the eon as the Pre-Archean.
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