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provisory
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Provo (1)
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provirus
pro·vi·rus [ prṓ vrəss, prō vrəss ] (plural pro·vi·rus·es)


noun 
Definition:
 
virus precursor: a form of a virus that is integrated into the genetic material of the host and passed on from one cell generation to the next
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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