prodrug A substance which, after metabolic action in the body, is coverted to an active drug. prodrug drug modified by biotransformation (i.e. metabolic processes) to achieve desired pharmacological action proÂ·drug (prÅ'drÅ­g) A class of drugs, the pharmacologic action of which results from conversion by metabolic processes within the body.
verb (used without object), sagged, sagging. 1. to sink or bend downward by weight or pressure, especially in the middle: The roof sags. 2. to hang down unevenly; droop: Her skirt was sagging.
1. verb. 1  If you stoop, you stand or walk with your shoulders bent forwards. 2  Stoop is also a noun. 3  If you stoop, you bend your body forwards and downwards. 4  If you say that a person stoops to doing something, you are criticizing them because they do something wrong or immoral that they would not normally do.