active anaphylaxis ac·tive anaphylaxis (āk’tĭv)
The anaphylactic response produced in an individual following inoculation with an antigen to which the person is sensitized.
- Active barrier
noun a movable object that prevents passage of certain entities but allows passage of predefined entities, esp. a security barricade Examples A sliding gate is an active barrier; a retaining wall is a passive barrier.
- Active centre
noun (biochem) the region in an enzyme molecule in which the reactive groups that participate in its action are juxtaposed Also called active site Historical Examples Wallingford, six miles above Streatley, is a very ancient town, and has been an active centre for the making of English history. Three Men in a Boat Jerome K. […]
- Active chronic hepatitis
active chronic hepatitis active chronic hepatitis n. Hepatitis with chronic portal inflammation that extends into the liver parenchyma. Also called posthepatitic cirrhosis.
- Active dbms
active dbms database A conventional or passive DBMS combined with a means of event detection and condition monitoring. Event handling is often rule-based, as with an expert system. (1994-11-08)