Example sentences from the Web for archaean

Again we must refrain from following in detail the development of this new world of life which branches off in the Archaean ocean.
The Story of Evolution|Joseph McCabe
They are known to be pre-Jurassic, but whether they are Palaeozoic or Archaean is uncertain.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2|Various
It was laid down close to the igneous Archaean rocks when Mother Earth was in her girlhood and water first began to flow.
Among the Forces|Henry White Warren
Their lithological characteristics and the total absence of all organic remains point to the Archaean period.
Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 4|Various

This place is about five hundred yards west of the bridge in an alcove in the Archaean Rock which forms the Canyon wall.
I Married a Ranger|Dama Margaret Smith

archaean

/ (ɑːˈkɪən) /

noun

any member of the Archaea, a domain of prokaryotic microorganisms, distinguished from bacteria on molecular phylogenetic grounds and often found in hostile environments, such as volcanic vents and hot springs

Words nearby archaean

Arcesius, arcform, arc furnace, arch, archaea, archaean, archaebacteria, archaebacterium, archaeo-, archaeoastronomy, archaeobotany

British Dictionary definitions for archaean (2 of 2)

Archaean

esp US Archean

/ (ɑːˈkiːən) /

adjective

of or relating to the highly metamorphosed rocks formed in the early Precambrian era

the earlier of two divisions of the Precambrian era, during which the earliest forms of life are assumed to have appeared

Compare Proterozoic

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for archaean

Archaean

[ är-kē′ən ]

Another spelling of Archean.

单词	archaean
释义	Example sentences from the Web for archaean Again we must refrain from following in detail the development of this new world of life which branches off in the Archaean ocean. The Story of Evolution\|Joseph McCabe They are known to be pre-Jurassic, but whether they are Palaeozoic or Archaean is uncertain. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2\|Various It was laid down close to the igneous Archaean rocks when Mother Earth was in her girlhood and water first began to flow. Among the Forces\|Henry White Warren Their lithological characteristics and the total absence of all organic remains point to the Archaean period. Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 4\|Various This place is about five hundred yards west of the bridge in an alcove in the Archaean Rock which forms the Canyon wall. I Married a Ranger\|Dama Margaret Smith archaean / (ɑːˈkɪən) / noun any member of the Archaea, a domain of prokaryotic microorganisms, distinguished from bacteria on molecular phylogenetic grounds and often found in hostile environments, such as volcanic vents and hot springs Words nearby archaean Arcesius, arcform, arc furnace, arch, archaea, archaean, archaebacteria, archaebacterium, archaeo-, archaeoastronomy, archaeobotany British Dictionary definitions for archaean (2 of 2) Archaean esp US Archean / (ɑːˈkiːən) / adjective of or relating to the highly metamorphosed rocks formed in the early Precambrian era the earlier of two divisions of the Precambrian era, during which the earliest forms of life are assumed to have appeared Compare Proterozoic Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for archaean Archaean [ är-kē′ən ] Another spelling of Archean. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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