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Military Health System Health Care Glossary serves as the official repository and consolidated reference (as a secondary source) for terms and definitions used within the MHS. Some terms may have multiple and varying definitions based on the context and primary source of authority. Note that certain definitions may be approved only for limited use in a single primary reference document, while others may have broad applicability in multiple contexts and issuances. To determine the most appropriate definition in a particular context, consult all relevant source documents. Any disparities between this Glossary and primary sources are unintentional, and the primary source shall control.