Hadean

== English == === Alternative forms === Hadaean === Etymology === From Hades +‎ -an, from Ancient Greek ᾍδης (Hāídēs). By surface analysis, had- +‎ -e- +‎ -an. === Pronunciation === IPA(key): /heɪˈdiːən/, /ˈheɪ.diːən/ Rhymes: -iːən, -eɪdiən === Proper noun === Hadean (geology) The Hadean eon; part of the Precambrian supereon, spanning from around 4.6 to 4 billion years ago. ==== Hypernyms ==== Precambrian ==== Coordinate terms ==== Archaean, Proterozoic - eons in Precambrian ==== Translations ==== === Adjective === Hadean (not comparable) Pertaining to Hades or hell. (geology) Of or relating to the Hadean geological eon. ==== Translations ==== === See also === Appendix:Geologic timescale === Anagrams === Dehaan, hadnae