| passive congestion | Congestion caused by obstruction or slowing of the venous drainage, resulting in partial stagnation of blood in the capillaries and venules. (05 Mar 2000) |
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| active congestion | Congestion due to an increased flow of arterial blood to a part. (05 Mar 2000) |
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| brain congestion | Increased volume of the intravascular compartment of the brain; often associated with brain swelling. Synonym: encephalaemia. (05 Mar 2000) |
| venous congestion | <physiology> Overfilling and distention of the veins with blood as a result of mechanical obstruction or right ventricular failure. (05 Mar 2000) |
| physiologic congestion | Hyperaemia occurring during functional activity of an organ. Synonym: physiologic congestion. (05 Mar 2000) |
| congestion | Excessive or abnormal accumulation of blood in a part. Origin: L. Congestio, from congerere = to heap together (18 Nov 1997) |
| hypostatic congestion | Congestion due to pooling of venous blood in a dependent part. Synonym: hypostasis. (05 Mar 2000) |
| functional congestion | Hyperaemia occurring during functional activity of an organ. Synonym: physiologic congestion. (05 Mar 2000) |
| artificial passive immunity | See: acquired immunity. (05 Mar 2000) |
| passive | Neither spontaneous nor active, not produced by active efforts. Origin: L. Passivus (18 Nov 1997) |
| passive agglutination | Agglutination of particles that have been coated with soluble antigen, by antiserum specific for the adsorbed antigen. Synonym: indirect agglutination. (05 Mar 2000) |
| passive-aggressive behaviour | Apparently compliant behaviour, with intrinsic obstructive or stubborn qualities, to cover deeply felt aggressive feelings that cannot be more directly expressed. (05 Mar 2000) |
| passive-aggressive personality | A personality disorder in which aggressive feelings are manifested in passive ways, especially through mild obstructionism and stubbornness. (05 Mar 2000) |
| passive-aggressive personality disorder | A personality disorder characterised by an indirect resistance to demands for adequate social and occupational performance; anger and opposition to authority and the expectations of others that is expressed covertly by obstructionism, procrastination, stubbornness, dawdling, forgetfulness, and intentional inefficiency. (12 Dec 1998) |
| passive anaphylaxis | A reaction resulting from inoculation of antigen in an animal previously inoculated intravenously with specific antiserum from another animal, a latent period being required between the two inoculations. Synonym: antiserum anaphylaxis. (05 Mar 2000) |
| passive atelectasis | The pulmonary collapse that occurs due to a space-occupying intrathoracic process such as pneumothorax or hydrothorax. (05 Mar 2000) |