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.
Hogging is the stress a ship's hull or keel experiences that causes the center or the keel to bend upward. Sagging is the stress a ship's hull or keel is placed under when a wave is the same length as the ship and the ship is in the trough of two waves.