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Definition of: proprietary
(prə.prī′ə·ter′ē) adjective
1. Pertaining to a proprietor; subject to exclusive ownership.
2. Designating an article, as a therapeutic device or medicine, protected as to name, composition, or process of manufacture by copyright, patent, secrecy, or other means.
—noun plural ·tar·ies
1. A proprietor or proprietors collectively.
2. Proprietorship. [<LL proprietarius <proprietas PROPERTY]
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