proprietary

 
Pronunciation: /prəˈprʌɪət(ə)ri/

adjective

  • 1relating to an owner or ownership: the company has a proprietary right to the property
  • behaving as if one owned something or someone: he looked about him with a proprietary air
  • 2(of a product) marketed under and protected by a registered trade name: proprietary brands of insecticide

Origin:

late Middle English (as a noun denoting a member of a religious order who held property): from late Latin proprietarius 'proprietor', from proprietas (see property)