| hemoptysis | <symptom> The expectoration of blood or of blood stained sputum. Origin: Gr. Ptyein = to spit (18 Nov 1997) |
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| hemorrhage | <physiology> The escape of blood from the vessels, bleeding. Small haemorrhages are classified according to size as petechiae (very small), purpura (up to 1 cm) and ecchymoses (larger). The massive accumulation of blood within a tissue is called a haematoma. Origin: Gr. Rhegnynai = to burst forth (18 Nov 1997) |
| hemorrhagic | <haematology> Relating to bleeding and haemorrhage. (09 Oct 1997) |
| hemorrhoid | <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) |
| hemorrhoids | <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) |
| hemosiderin | <protein> A mammalian iron storage protein related to ferritin but less abundant. (18 Nov 1997) |
| hemostasis | <haematology, physiology, haematology> The arrest of bleeding, either by the physiological properties of vasoconstriction and coagulation or by surgical means. Origin: Gr. Stasis = halt (18 Nov 1997) |
| hemostatic | 1. <medicine> Of or relating to stagnation of the blood. 2. Serving to arrest hemorrhage; styptic. A medicine or application to arrest hemorrhage. Origin: Gr. Causing to stand, fr. To stand. Source: Websters Dictionary (01 Mar 1998) |
| hemotaphonomy | <study> The study of bloodstains, and specially of the changes in appearance and size of the cellular components, as well as the characteristics of their cell position and appearance in function of the superficial topography and composition of the substrate. (27 Nov 1998) |
| hemothorax | <medicine> An effusion of blood into the cavity of the pleura. Origin: NL. See Hemo-, and Thorax. Source: Websters Dictionary (01 Mar 1998) |