Active barrier


a movable object that prevents p-ssage of certain ent-ties but allows p-ssage of predefined ent-ties, esp. a security barricade

a sliding gate is an active barrier; a retaining wall is a p-ssive barrier.

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  • Active centre

    noun (biochem) the region in an enzyme molecule in which the reactive groups that partic-p-te 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 hepat-tis active chronic hepat-tis n. hepat-tis with chronic portal inflammation that extends into the liver parenchyma. also called posthepat-tic cirrhosis.

  • Active dbms

    active dbms database a conventional or p-ssive 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)

  • Active congestion

    active congestion active congestion n. congestion caused by an increased flow of arterial blood to a part of the body. historical examples in cases of active congestion the warm footbaths should be omitted and cold ones used from the commencement. special report on diseases of the horse united states department of agriculture with more probability […]

  • Active directory

    active directory operating system a directory service from microsoft corporation, similar in concept to novell netware directory services (nds), that also integrates with the user organisation’s dns structure and is interoperable with ldap. active directory is included in windows 2000. (2000-03-28)

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