Definitions

1. noun

a medicine or treatment considered to be untested or unproven, or a solution offered as a cure-all

“He peddled a nostrum for curing every disease known to man.”

2. noun

a formula or prescription for a medicinal preparation

“The pharmacist gave him the nostrum to help him recover from the illness.”

3. verb

to offer a solution, especially an untested or unproven one, as a cure-all

“The salesman nostrumed the crowd with his new product.”