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comorbidity
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commutation

com·mu·ta·tion [ kòmmyə táysh'n ] (plural com·mu·ta·tions)


noun 
Definition:
 
1. criminal law reduction in severity of legal penalty: the reduction of a prison sentence or other legal penalty to a less severe one

2. transportation commuter's travel: the traveling undertaken by a commuter

3. electricity conversion of electric current: the converting of an electric current from alternating to direct current or vice versa

4. conversion: an exchange or substitution, e.g. the substitution of one kind of payment for another ( formal )

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