actium
- n an ancient town on a promontory in western Greece
- n the naval battle in which Antony and Cleopatra were defeated by Octavian's fleet under Agrippa in 31 BC
activase
- n a thrombolytic agent (trade name Activase) that causes fibrinolysis at the site of a blood clot; used in treating acute myocardial infarction
activated carbon
- n powdered or granular carbon used for purifying by adsorption; given orally (as a slurry) it is an antidote for some kinds of poisons