proprietary drug is a noun meaning "a drug that has a trade name and is protected by a patent (can be produced and sold only by the company holding the patent)". It carries one recorded sense.
a drug that has a trade name and is protected by a patent (can be produced and sold only by the company holding the patent)
Definitions, synonyms and semantic relations for proprietary drug come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.