| hockherb | <botany> The mallow. Source: Websters Dictionary (01 Mar 1998) |
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| HOCM | <abbreviation> 1. high osmolar contrast medium. 2. hypertrophic obstructive cardiomyopathy. (21 Jun 2000) |
| hod | 1. A kind of wooden tray with a handle, borne on the shoulder, for carrying mortar, brick, etc. 2. A utensil for holding coal; a coal scuttle. Origin: Prov. E. For hold, i. E, that which holds. See Hold. Source: Websters Dictionary (01 Mar 1998) |
| hoddy | <zoology> See Dun crow, under Dun. Origin: Prob. For hooded. Source: Websters Dictionary (01 Mar 1998) |
| Hodge's pessary | <gynaecology> A double-curve oblong pessary employed for the correction of retrodeviations of the uterus. (05 Mar 2000) |
| Hodge, Hugh | <person> U.S. Gynecologist, 1796-1873. See: Hodge's pessary. (05 Mar 2000) |
| Hodgen splint | <orthopaedics> A suspension leg splint for fractures of the middle or lower end of the femur; it provides support for traction. (05 Mar 2000) |
| Hodgen, John | <person> U.S. Surgeon, 1826-1882. See: Hodgen splint. (05 Mar 2000) |
| Hodgkin's disease | <haematology, oncology> A human malgnant disorder of lymph tissue (lymphoma) that appears to originate in a particular lymph node and later spreads to the spleen, liver and bone marrow. It occurs mostly in individuals between the ages of 15 and 35. It is characterised by progressive, painless enlargement of the lymph nodes, spleen and general lymph tissue. Giant cells, the Reed Sternberg cells, with mirror image nuclei are diagnostic. Immunological depletion, caused perhaps by the excessive growth of neoplastic histiocytes, occurs. Four types of the disease are recognised depending on the relative predominance of various neoplastic derivatives of the lymphoid series. Pyrexia is often a feature of the disease. Death often results from generalised immunological inability to respond to infections. If detected early, it has a high remission rate. Staging: Ann Arbor classification; each stage is further classified as:, A no symptoms, B fever, sweats, weight loss. Stage I - involvement of a single lymph-node region or extralymphatic site. Stage II - two or more sites of involvement on the same side of the diaphragm. Stage III - disease involvement on both sides of the diaphragm. Stage IV - disseminated disease of extralymphatic organs, with or without lymph-node involvement. Indicence: approximately 1,500 new cases per year in the UK. (30 Mar 2000) |
| Hodgkin's lymphoma | <haematology, oncology> A human malgnant disorder of lymph tissue (lymphoma) that appears to originate in a particular lymph node and later spreads to the spleen, liver and bone marrow. It occurs mostly in individuals between the ages of 15 and 35. It is characterised by progressive, painless enlargement of the lymph nodes, spleen and general lymph tissue. Giant cells, the Reed Sternberg cells, with mirror image nuclei are diagnostic. Immunological depletion, caused perhaps by the excessive growth of neoplastic histiocytes, occurs. Four types of the disease are recognised depending on the relative predominance of various neoplastic derivatives of the lymphoid series. Pyrexia is often a feature of the disease. Death often results from generalised immunological inability to respond to infections. If detected early, it has a high remission rate. Staging: Ann Arbor classification; each stage is further classified as:, A no symptoms, B fever, sweats, weight loss. Stage I - involvement of a single lymph-node region or extralymphatic site. Stage II - two or more sites of involvement on the same side of the diaphragm. Stage III - disease involvement on both sides of the diaphragm. Stage IV - disseminated disease of extralymphatic organs, with or without lymph-node involvement. Indicence: approximately 1,500 new cases per year in the UK. (30 Mar 2000) |
| Hodgkin, Alan | <person> British physiologist and Nobel laureate, *1914. See: Goldman-Hodgkin-Katz equation. (05 Mar 2000) |
| Hodgkin, Thomas | <person> British physician, 1798-1866. See: Hodgkin's disease, Hodgkin-Key murmur, non-Hodgkin's lymphoma. (05 Mar 2000) |
| Hodgkin-Key murmur | <cardiology, clinical sign> A musical diastolic murmur associated with retroversion of an aortic cusp; often very loud. (05 Mar 2000) |
| Hodgson, Joseph | <person> British physician, 1788-1869. See: Hodgson's disease. (05 Mar 2000) |
| hodograph | <mathematics> A curve described by the moving extremity of a line the other end of which is fixed, this line being constantly parallel to the direction of motion of, and having its length constantly proportional to the velocity of, a point moving in any path; -used in investigations respecting central forces. Origin: Gr. Path + graph. Source: Websters Dictionary (01 Mar 1998) |