Is the orphan of "orphan drug" related to the parentless definition of orphan? I can stretch the two definitions together, but I am interested in a more definitive answer.

excerpted Gurunet reference: Orphan drugs, developed under the U.S. Orphan Drug Act (1983), treat diseases that affects a relatively small number of people. The terms of the orphan drug law offer tax breaks and a seven-year monopoly on drug sales to induce companies to undertake development and manufacturing of such drugs, which otherwise might not be profitable.