1. General term for a therapeutic agent, sometimes patented but usually of secret composition, offered to the general public as a specific remedy for any disease or class of diseases. Term currently carries a pejorative connotation.
The definition information for nostrum is provided by Stedman's. You can search our medical dictionary here.
Stedman's, part of Lippincott Williams & Wilkins, provides a comprehensive line of health-science publications for healthcare professionals and medical students.