2. Initialism. (US legal) '''N'''ew '''D'''rug '''A'''pplication; an application for approval by the Food and Drug Administration of a new pharmaceutical compound for introduction to the market. ¹
¹ Source: wiktionary.com
Medical Definition of Nda
1. New Drug Application An application to the FDA for approval to market a drug in the U.S. The FDA determines if a protein pharmaceutical is considered a drug or a biologic and whether an NDA or a PLA, respectively, should be filed to obtain marketing approval. (14 Nov 1997)