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prebuilt
precalc
precalculus
Precambrian
precancel
precancerous
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preatomic
pre·a·tom·ic [ pr ə tómmik ]


adjective 
Definition:
 
before atomic energy or weapons: relating or belonging to the time before atomic energy was developed or atomic weapons existed
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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