Category: H

  • Hemagglutination

    A specific form of agglutination that involves red blood cells. A process by which mammalian red blood cells are caused to clump or agglutinate as a result of the interaction of antigen, antibody, and complement, or directly by cells such as viruses. Clumping together of red blood cells. The phenomenon of agglomeration or aggregation of…

  • Helminthiasis

    A disease in which a part of the body is infested with worms such as pinworm, roundworm or tapeworm. Infestation of the intestinal tract with worms, helminth. Infestation with parasitic worms. Infestation of the body with worms that may affect the skin or the intestines or other internal organs. The diseased condition resulting from an…

  • Heat rash

    Any condition aggravated by heat or hot weather such as intertrigo. A type of rash associated with local irritation from perspiration; in babies it is often found in the diaper area and folds of the skin, and generally responds to loose clothing and exposure to air. Fine papular inflammation of the skin resulting from heat…

  • Heartburn

    Burning sensation in the stomach and esophagus caused by excessive acidity of the stomach fluids. Aburning sensation in the chest usually caused by reflux (regurgitation) of acid digestive juices from the stomach into the oesophagus. A common form of indigestion, treated by antacids. Painful, burning feeling in the chest caused by stomach acid flowing back…

  • HBsAg

    Hepatitis B s antigen.  

  • HBeAg

    Hepatitis B e antigen.  

  • Hallucinogenic

    Causes visions or inducing hallucinations. Causes visions or delusions. A chemical capable of producing distortions of the senses. Referring to a substance which produces hallucinations.  

  • Hallucinogen

    Drug that produces hallucinogen. The syndrome includes maladaptive behavioral or psychological changes such as marked anxiety or depression, fear of losing one’s mind, paranoid ideation, and impaired judgment. Also, perceptual changes such as intensified perceptions, illusions, hallucinations, derealization, and depersonalization occur in a state of full wakefulness. Some physical signs include sweating, very rapid heartbeat,…

  • Haemostatic, hemostatic

    Something that stops bleeding. A substance that reduces or stops bleeding.  

  • Haemostasis, hemostasis

    A complex process which causes the bleeding process to stop. The process of stopping bleeding or slowing the movement of blood. The process by which bleeding stops. It involves constriction of blood vessels, the formation of a platelet plug, and blood clotting. The term is also used for surgical interventions to stop bleeding for example,…