| haemorrhagic rickets | Bone changes seen in infantile scurvy, consisting of subperiosteal haemorrhage and deficient osteoid tissue formation; often used to indicate simultaneous occurrence of rickets and scurvy. Synonym: acute rickets. Hereditary hypophosphatemic rickets, with hypercalciuria, an inherited disorder in which there is a defect in renal tubular reabsorption. (05 Mar 2000) |
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| haemorrhagic scurvy | Scurvy with extensive haemorrhages in gums, skin and other tissues, typical of severe stage of the disease. Infantile scurvy, osteopathia haemorrhagia infantum;a cachectic condition in infants, resulting from malnutrition and marked by pallor, fetid breath, coated tongue, diarrhoea, and subperiosteal haemorrhages; probably a combination of scurvy and rickets due to combined deficiency of vitamins C and D. Synonym: Barlow's disease, Cheadle's disease, osteopathia haemorrhagica infantum, scurvy rickets. Land scurvy, formerly, scurvy occurring in people who had not been to sea. (05 Mar 2000) |
| haemorrhagic septicaemia | <microbiology> Haemorrhagic septicaemia is an infectious disease of cattle and buffalo which is caused by the bacteria Pasteurella multocida. Symptoms include fever, appetite loss, and drooling. It appears as a result of stress from malnutrition, exhaustion, or lengthy transportation. (09 Oct 1997) |
| haemorrhagic shock | Hypovolaemic shock resulting from acute haemorrhage, characterised by hypotension, tachycardia, pale, cold, and clammy skin, and oliguria. (05 Mar 2000) |
| haemorrhagic smallpox | A severe and frequently fatal form of smallpox accompanied by extravasation of blood into the skin in the early stage, or into the pustules at a later stage, accompanied often by nosebleed and haemorrhage from other orifices of the body. Synonym: fulminating smallpox, variola haemorrhagica. (05 Mar 2000) |
| haemorrhagin | <protein> A toxin that breaks down blood vessels and endothelial cells, thus causing bleeding. (09 Oct 1997) |
| haemorrhagins | A group of toxins found in certain venoms and poisonous material from some plants, e.g., rattlesnake venom and ricin; haemorrhagins cause degeneration and lysis of endothelial cells in capillaries and small vessels, thereby resulting in numerous small haemorrhages in the tissues. Origin: haemorrhage + -in (05 Mar 2000) |
| haemorrhoid | Denoting one of the tumours or varices constituting haemorrhoids. (05 Mar 2000) |
| haemorrhoidal | 1. Of or pertaining to, or of the nature of, haemorrhoids. 2. <anatomy> Of or pertaining to the rectum; rectal; as, the hemorrhoidal arteries, veins, and nerves. Origin: Cf. F. Hemorroidal, hemorrhoidal. (01 Dec 1998) |
| haemorrhoidal nerves | See: superior rectal plexus, middle rectal plexuses, inferior rectal nerves. (05 Mar 2000) |
| haemorrhoidal plexus | A venous plexus resting upon the posterior and lateral walls of the rectum; it drains into the superior rectal vein to the portal, the middle rectal to the internal iliac and the inferior rectal to the internal pudendal. Synonym: plexus venosus rectalis, haemorrhoidal plexus. (05 Mar 2000) |
| haemorrhoidal veins | An obsolete term for rectal veins. See: inferior rectal veins, middle rectal veins, superior rectal vein. (05 Mar 2000) |
| haemorrhoidal zone | The part of the anal canal that contains the rectal venous plexus. Synonym: annulus haemorrhoidalis, zona haemorrhoidalis. (05 Mar 2000) |
| haemorrhoidectomy | <procedure, surgery> Removal of haemorrhoids. Indicated in cases of persistent anal pain or bleeding. There is a convalescent period of approximately 2 weeks associated with this procedure. A good outcome is seen in better than 90% of cases. (27 Sep 1997) |
| haemorrhoids | <anatomy, surgery> A varicose dilatation of a vein of the superior or inferior haemorrhoidal plexus, resulting from a persistent increase in venous pressure. Presents as a livid and painful swelling formed by the dilation of the blood vessels around the margin of, or within, the anus, from which blood or mucus is occasionally discharged. The singular haemorrhoid is rarely used. Synonym: piles. Origin: Gr. Haimorrhois, L. Haemorrhoidae. (01 Dec 1998) |