Copyright © Philip M. Parker, INSEAD. Terms of Use.
Definition: Hadean |
HadeanAdjective1. Of or relating to or characteristic of Hades or Tartarus. Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. |
Synonyms: HadeanSynonyms: Plutonian (adj), Tartarean (adj). (additional references) |
(From Wikipedia, the free Encyclopedia)
This period is part of theProterozoic era. |
Hadean |
Archaean |
Paleoproterozoic |
Mesoproterozoic |
Neoproterozoic |
The Hadean is a geologic period; a somewhat outdated term for the time period prior to 3,800,000,000 years before the present -- 3800MA. It was originally intended to address the period before the earliest known rocks. In the last decades of the 20th Century a few Hadean rocks have been identified in Western Greenland, Northwestern Canada and West Australia. The term is not often used.
The oldest known rock formations are somewhat altered sediments from Greenland dated around 3800MA by a volcanic dike that penetrated the rocks after they were deposited. Individual zircon crystals redeposited in sediments in Western Canada and the Jack Hills region of West Australia are much older. The oldest dated zircons date from about 4400MA which is very close to the hypothesized time of the Earth's formation. The Greenland sediments include Banded Iron beds. They contain possibly organic carbon and quite possibly indicate that photosynthetic life was already in place at that time. The oldest known fossils (from Australia) are a few hundred million years younger.
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Hadean."
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day |
era hadean | 5 |
hadean | 3 |
| Source: compiled by the editor from various references; see credits. | |
| Language | Translations for "hadean"; alternative meanings/domain in parentheses. | |
Pig Latin | adeanhay.(various references) | |
| Source: compiled by the editor from various translation references. | ||
Misspellings | |
"Hadean" is suggested in spellcheckers for the following: Adeang, ahean, Bhadgaon, chaddian, chaldean, Ghedina, Haddaaj, haden, Hadera, Hadman, Haena, haidian, haldwani, Hamdija, hatan, havenae, hebean, heden, Hradcany, hudnae, kadazan, khudian, Nadena, Rhidian. (additional references) | |
| Source: compiled by the editor, based on several corpora (additional references). | |
Scrabble® Enable2K-Verified Anagrams | |
| Words within the letters "a-a-d-e-h-n" | |
-1 letter: aahed, ahead. | |
-2 letters: dean, hade, haed, haen, hand, head, nada. | |
-3 letters: aah, aha, ana, and, ane, dah, den, edh, end, had, hae, hen, nae, nah. | |
-4 letters: aa, ad, ae, ah, an, de, ed, eh, en, ha, he, na, ne. | |
| Words containing the letters "a-a-d-e-h-n" | |
+1 letter: headman. | |
+2 letters: hacienda, handmade, hangared, headband, headland, headsman, nailhead, verandah. | |
+3 letters: anhedonia, deathsman, enchilada, hacendado, haciendas, handlebar, handshake, harangued, headbands, headlands, headstand, heartland, heathland, hosannaed, hydrangea, manhandle, nailheads, panhandle, stagehand, unabashed, unashamed, verandahs. | |
+4 letters: adhesional, anhedonias, antheridia, archdeacon, avalanched, backhanded, backhander, barehanded, chainsawed, chairmaned, chargehand, dragonhead, enchiladas, fatherland, hacendados, haciendado, handbasket, handfasted, handleable, handlebars, handmaiden, handshakes, hardhanded, headstands, heartlands, heathlands, heavenward, hydrangeas, lanthanide, machinated, maidenhair, maidenhead, manhandled, manhandles, panhandled, panhandler, panhandles, pentahedra, phantasied, rainwashed, shanghaied, stagehands, unattached, verandahed. | |
+5 letters: annihilated, antheridial, anticathode, archdeacons, backhanders, blackhander, brainwashed, cachinnated, cantharides, chairmanned, chargehands, cleanhanded, deadheading, diaphaneity, diencephala, dragonheads, fatherlands, grandfather, haciendados, haggardness, halogenated, handbaskets, handbreadth, handcrafted, handicapped, handicapper, handmaidens, harebrained, heavenwards, hollandaise, hydralazine, lanthanides, maidenhairs, maidenheads, mastheading, neanderthal, nonattached, panhandlers, pentahedral, transshaped, unabashedly, unashamedly. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
Hexadecimal (or equivalents, 770AD-1900s) (references)48 61 64 65 61 6E |
| Leonardo da Vinci (1452-1519; backwards) (references)
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| American Sign Language (origins from 1620-1817 in Italy and, especially, France) (references)
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| Semaphore (1791, in France) (references)
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| Braille (1829, in France) (references)
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Morse Code (1836) (references).... .- -.. . .- -. |
| Dancing Men (Sir Arthur Conan Doyle, 1903) (references)
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Binary Code (1918-1938, probably earlier) (references)01001000 01100001 01100100 01100101 01100001 01101110 |
HTML Code (1990) (references)H a d e a n |
ISO 10646 (1991-1993) (references)0048 0061 0064 0065 0061 006E |
| British Sign Language (Fingerspelling, BSL; 1992, British Deaf Association Dictionary of British Sign Language) (references)
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Encryption (beginner's substitution cypher): (references)426770716780 |
| 1. Definition 2. Synonyms 3. Expressions: Internet 4. Translations: Modern | 5. Derivations 6. Anagrams 7. Orthography 8. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
