| haemodynamics | The movements of the blood and the forces involved in systemic or regional blood circulation. (12 Dec 1998) |
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| haemodynamometer | An instrument for determining the blood pressure. Synonym: haemadynamometer. Origin: haemo-+ G. Dynamis, force, + metron, measure (05 Mar 2000) |
| haemodyscrasia | Any abnormal condition or disorder of the blood and haemopoietic tissue, used especially with reference to those resulting in changes in the formed elements. Synonym: haematodyscrasia. Origin: haemo-+ G. Dyscrasia, bad temperament (05 Mar 2000) |
| haemodystrophy | Any disease or abnormal condition of the blood and haemopoietic tissues, exclusive of simple transitory changes. Synonym: haematodystrophy. (05 Mar 2000) |
| haemoendothelial placenta | <gynaecology> A haemoendothelial placenta is a type of placenta in which the inner lining (endothelium) of the capillaries of the chorion (membrane enclosing the foetus) comes in direct contact with the mother's blood. (09 Oct 1997) |
| haemofiltration | Extracorporeal ultrafiltration technique without haemodialysis for treatment of fluid overload and electrolyte disturbances affecting renal, cardiac, or pulmonary function. (12 Dec 1998) |
| haemoflagellates | Protozoan flagellates in the family Trypanosomatidae that are parasitic in the blood of many species of domestic and wild animals and birds, and of humans; they include the genera Leishmania and Trypanosoma, several species of which are important pathogens. Origin: haemo-+ L. Flagellum, dim. Of flagrum, a whip (05 Mar 2000) |
| haemofuscin | A brown pigment derived from haemoglobin that occurs in urine occasionally along with haemosiderin, usually indicative of increased red blood cell destruction; occurs also in the liver with haemosiderin in cases of haemochromatosis. (05 Mar 2000) |
| haemogenesis | <haematology> The formation and development of blood cells involving both proliferation and differentiation from stem cells. In adult mammals usually occurs in bone marrow. (18 Nov 1997) |
| haemogenic | <pharmacology> Refers to an agent or process that affects or promotes the formation of blood cells. (09 Oct 1997) |
| haemoglobin | <cell biology, haematology> Four subunit globular oxygen carrying protein of the erythrocytes of vertebrates and some invertebrates. It is a conjugated protein containing four haem groups and globin. There are two alpha and two beta chains (very similar to myoglobin) in adult humans, the haem moiety (an iron containing substituted porphyrin) is firmly held in a nonpolar crevice in each peptide chain. There are four globin polypeptide chains, designated alpha, beta, gamma, delta in the adult. Each is composed of several hundred amino acids. (08 Mar 2000) |
| haemoglobin A | <haematology> Haemoglobin A is the normal form of the protein haemoglobin which is found in adults. It is composed of two alpha chains and two beta chains. (09 Oct 1997) |
| haemoglobin a, glycosylated | Minor haemoglobin components of human erythrocytes designated a1a, a1b, and a1c. Haemoglobin a1c is most important since its sugar moiety is glucose covalently bound to the terminal amino acid of the beta chain. Since normal glycohemoglobin concentrations exclude marked blood glucose fluctuations over the preceding three to four weeks, the concentration of glycosylated haemoglobin a is a more reliable index of the blood sugar average over a long period of time. (12 Dec 1998) |
| haemoglobin A1C | <haematology> The substance of red blood cells that carries oxygen to the cells and sometimes joins with glucose. Because the glucose stays attached for the life of the cell (about 4 months), a test to measure haemoglobin A1C shows what the person's average blood glucose level was for that period of time. (09 Oct 1997) |
| haemoglobin A2 | <chemical> An adult haemoglobin component normally present in haemolysates from human erythrocytes in concentrations of about 3%. The haemoglobin is composed of two alpha chains and two delta chains. The percentage of hba2 varies in some haematologic disorders, but is about double in beta-thalassaemia. Chemical name: Haemoglobin A2 (12 Dec 1998) |
| Haemophilus aegyptius |
A species that can cause bacterial conjunctivitis and a potentially life-threatening pediatric infection called Brazilian purpuric fever.
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