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Arch.
arch (1)
arch (2)
arch-
arch.
arch bridge
archae-
archaea
Archaean
archaebacteria
archaeo-
archaeoastronomy
archaeobotany
archaeological
archaeological dating
archaeology
archaeomagnetism
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Archaean
Ar·chae·an


noun,

adjective 
Definition:
 
geology 
Another spelling of  Archean
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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