| hematology | <study> The study of the morphology of the blood and blood forming tissues. (18 Nov 1997) |
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| hematoma | <haematology, pathology> A localised collection of blood, usually clotted, in an organ, space or tissue, due to a break in the wall of a blood vessel. (18 Nov 1997) |
| hematophilia | <medicine> A condition characterised by a tendency to profuse and uncontrollable hemorrhage from the slightest wounds. Origin: NL, fr. Gr. A"i^ma, a"imatos, blood + to love. Source: Websters Dictionary (01 Mar 1998) |
| hematopoesis | <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) |
| hematopoiesis | <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) |
| hematopoietic stem cell | <haematology> Cell that gives rise to distinct daughter cells, one a replica of the stem cell, one a cell that will further proliferate and differentiate into a mature blood cell. Pluripotent stem cells can give rise to all lineages, committed stem cells (derived from the pluripotent stem cell) only to some. (18 Nov 1997) |
| hematosin | <physiology> The haematin of blood. Source: Websters Dictionary (01 Mar 1998) |
| hematosis | <physiology> Sanguification; the conversion of chyle into blood. The arterialization of the blood in the lungs; the formation of blood in general; haematogenesis. Origin: NL, fr. Gr. A"imatwsis. Source: Websters Dictionary (01 Mar 1998) |
| hematotherma | <zoology> The warm-blooded vertebrates, comprising the mammals and birds; the antithesis to haematocrya. Origin: NL, from Gr. A"i^ma, a"imatos, blood + thermos warm. Source: Websters Dictionary (01 Mar 1998) |
| hematothermal | <physiology> Having warm blood; applied especially to those animals, as birds and mammals, which have warm blood, or, more properly, the power of maintaining a nearly uniform temperature whatever the temperature of the surrounding air. See Homoiothermal. Source: Websters Dictionary (01 Mar 1998) |
| hematoxylin | <chemical> Basophilic stain that gives a blue colour (to the nucleus of a cell for example), commonly used in conjunction with eosin that stains the cytoplasm pink or red. Various modifications of haematoxylin have been developed. The histopathologist's H&E is haematoxylin and eosin. (18 Nov 1997) |
| hematuria | <clinical sign, urology> The finding of blood in the urine. Origin: Gr. Ouron = urine (18 Nov 1997) |
| hemautography | <physiology> The obtaining of a curve similar to a pulse curve or sphygmogram by allowing the blood from a divided artery to strike against a piece of paper. Source: Websters Dictionary (01 Mar 1998) |
| heme | 1. <biochemistry> Compounds of iron complexed in a porphyrin (tetrapyrrole) ring that differ in side chain composition. Haems are the prosthetic groups of cytochromes and are found in most oxygen carrier proteins. 2. <prefix> haem-, eaning relating to blood. Origin: G. Haima (21 Jun 2000) |
| hemelytrum | Origin: NL. See Hemi, and Elytron. <zoology> One of the partially thickened anterior wings of certain insects, as of many Hemiptera, the earwigs, etc. Source: Websters Dictionary (01 Mar 1998) |