There are multiple definitions:

1. direct-acting antiviral(English)

   • Virology

2. double aortic arch(English)

   • the most common cause of tracheoesophageal compression, with an incidence of 46% to 76% in reports of vascular rings
   • Congenital disorders, Cardiology
   • https://doi.org…-6929-1.00042-3