proprietary
B2CEFR level
35/100Rarity: fairly common
TechnicalRegister
Medicine adjective
Sold under a manufacturer's registered brand name.
You may know the proprietary name, but the label shows the generic ingredient.
Law adjective
Relating to a claim or remedy asserting a right in a specific asset itself rather than a mere personal claim for its value.
A proprietary claim gave the beneficiaries priority over the insolvent trustee's unsecured creditors.
Business adjective
Owned and legally protected by a company.
The algorithm is proprietary and closely guarded.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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