pro·pri·e·tary p(r)ə-'prī-ə-.ter-ē n, pl -tar·ies something that is used, produced, or marketed under exclusive legal right of the inventor or maker specif a drug (as a patent medicine) that is protected by secrecy, patent, or copyright against free competition as to name, product, composition, or process of manufacture
proprietary adj
1) used, made, or marketed by one having the exclusive legal right <a \proprietary drug>
2) privately owned and managed and run as a profit-making organization <a \proprietary clinic>

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pro·pri·e·tary (pro-priґə-tar-e) protected against free competition by patent, trademark, or other means.

Medical dictionary. 2011.