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back boiler
back boundary line
back burner
back catalog
back channel
back concession
back copy
back country
back crawl
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back emf
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back end
back end load
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back mutation
back mu·ta·tion (plural back mu·ta·tions)


noun 
Definition:
 
reversion of gene to original form: the reversion of a mutated gene to its original form
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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