(a.) Ancient; pertaining to the earliest period in geological history.
(n.) The earliest period in geological period, extending up to the Lower Silurian. It includes an Azoic age, previous to the appearance of life, and an Eozoic age, including the earliest forms of life.
Example Sentences:
(1) We formulate the following hypothesis: Life's origin may have occurred during the lower Archaean at a time when the environmental temperature was higher than it is at present.
(2) Hence, the occurrence of sulfate evaporites in Archaean sediments does not necessarily provide testimony of oxidation weathering on the ancient continents and, consequently, of the existence of an atmospheric oxygen reservoir.
(3) Incipient minor differentiation of the isotope pattersn notably of Archaean sulfates may be accounted for by photosynthetic sulfur bacteria rather than by sulfate reducers.
(4) (2) Isotopic evidence of dissimilatory sulfate reduction is first observed in the upper Archaean of the Aldan Shield, Siberia (approximately 3.0 x 10(9) yr) and in the Michipicoten and Woman River banded iron formations of Canada (2.75 x 10(9) yr).
(5) The presently available sedimentary sulfur isotope record for the Precambrian seems to allow the following conclusions: (1) In the Early Archaean, sedimentary delta 34S patterns attributable to bacteriogenic sulfate reduction are generally absent.
(6) (4) With the bulk of sulfate in the Archaean oceans probably produced by photosynthetic sulfur bacteria, the accumulation of SO4(2-) in the ancient seas must have preceded the buildup of appreciable steady state levels of free oxygen.
Eon
Definition:
(n.) Alt. of Aeon
Example Sentences:
(1) In response to the Advisory Committee on training in Nursing recommendations EONS in association with Marie Curie Memorial Foundation organized a workshop, where representatives of the 12 member states of the EEC, actively involved in cancer nursing education, were invited to prepare a core curriculum in cancer nursing education.
(2) Casino Royale, whose rights had been individually sold off by Fleming in 1955, eventually passed to Eon in 1999 as a result of an agreement between Eon’s backers MGM and rival Hollywood studio Sony – thereby clearing the way for the 2006 version.
(3) Eon only regained the rights to use Spectre and Blofeld in 007 movies last year after resolving a long-running legal dispute stretching back to a suggestion, in 1959, by the Irish writer Kevin McClory that Ian Fleming, the spy’s creator, should pen a Bond film set in the Bahamas .
(4) Accumulation of random mutations and large macromolecular sequence change in all organisms since the Proterozoic Eon has been importantly supplemented by acquisition of inherited genomes ('symbiogenesis').
(5) Karyotypic alterations (polyploidization and karyotypic fissioning) have been added to these other mechanisms of species origin in plants and animals during the Phanerozoic Eon.
(6) Authentic Scottish Labour, no longer a “branch office” of the party in Westminster, needs to keep top talent at Holyrood, after eons of brain-drain southwards.
(7) Ofgem is understood to believe the big six – Centrica's British Gas, EDF Energy, RWE Npower, SSE, Eon and Scottish Power – hold up to £400m in millions of accounts closed after customers switched suppliers or moved home.
(8) Vin reminds me that we have not had a change in score since the third inning, which was eons ago.
(9) In his first major interview since taking office, Will Day, the incoming chair of the Sustainable Development Commission (SDC), told the Guardian that construction of new coal stations, such as the planned Eon Kingsnorth facility in Kent, would provide a "lightning rod" for international protest.
(10) However, it’s clear that Eon does its best to use British directors, reinforcing the national brand identity that is part of the Bond selling point.
(11) However, after a six-year break, Eon installed Martin Campbell in the chair: another experienced director, but one who was able to orchestrate one of the most elaborate stunts in Bond history.
(12) Frankly, producers Eon would have been better off giving the lead to Madonna’s innuendo-dispensing fencing instructor, but perhaps the idea deserves a revamp more than a decade on.
(13) The Sky deal comprises the 22 official Bond films made by Eon Productions as well as two non-Eon movies – Casino Royale and Never Say Never Again.
(14) Don Lieper , director of new business at Eon, said: "We take this very seriously – it is a legal requirement.
(15) But he appeared to rule himself out in April, telling an audience at London’s British Film Institute that he had given up on getting the call from 007 production company Eon.
(16) Local distributor eOne was quick to trumpet this achievement as bigger than the UK opening of Slumdog Millionaire (£1.83m from 324 cinemas), and with a higher screen average than the debut of The King's Speech (£8,919).
(17) For example, the functional competence of most, if not all, of the sugar-metabolizing enzymes was clearly established before the division of eukaryotes from prokaryotes eons ago, each critical active-site amino acid sequence being conserved ever since by bacteria as well as by mammals.
(18) Photograph: eOne If he is indeed the nemesis of Luke Skywalker & Co, he has bodybuilder-size shoes to fill ( David Prowse , who wore the original suit, stood at 6ft 6in).
(19) This paper outlines the content of that core curriculum and presents EONS' subsequent plans to design educational courses in all aspects of cancer care for European nurses.
(20) The sites have been nominated by the energy giants EDF, Eon and RWE, and by the Nuclear Decommissioning Authority (NDA), which owns some nuclear sites.