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atom
atom bomb
atom smasher
atomic
atomic absorption spectroscopy
Atomic Age
atomic bomb
atomic clock
atomic cocktail
atomic demolition munition
atomic emission spectroscopy
atomic energy
atomic force microscope
atomic heat
atomic mass
atomic mass unit
atomic number
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atmo-
atmo-


prefix 
Definition:
 
gas, vapor
[< Greek atmos "breath, vapor" < Indo-European, "to blow"]
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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