| haecceity | (noun) the essence that makes something the kind of thing it is and makes it different from any other | Synonyms: quiddity |
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| haem | (noun) a complex red organic pigment containing iron and other atoms to which oxygen binds | Synonyms: haemitin, hematin, heme, protoheme |
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| haemagglutinate | (verb) cause the clumping together (of red blood cells) | Synonyms: hemagglutinate |
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| haemagglutination | (noun) agglutination of red blood cells | Synonyms: hemagglutination |
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| haemal | (adjective) relating to the blood vessels or blood | Synonyms: haematal, hemal, hematal |
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| haemangioma | (noun) benign angioma consisting of a mass of blood vessels; some appear as birthmarks | Synonyms: hemangioma |
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| haematal | (adjective) relating to the blood vessels or blood | Synonyms: haemal, hemal, hematal |
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| haematemesis | (noun) vomiting blood | Synonyms: hematemesis |
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| haematic | (adjective) relating to or containing or affecting blood | Synonyms: haemic, hematic, hemic |
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| haematinic | (noun) a medicine that increases the hemoglobin content of the blood; used to treat iron-deficiency anemia | Synonyms: hematinic |
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| haematite | (noun) the principal form of iron ore; consists of ferric oxide in crystalline form; occurs in a red earthy form | Synonyms: hematite |
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| haematocele | (noun) swelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis) | Synonyms: haematocoele, hematocele, hematocoele |
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| haematochezia | (noun) passage of stools containing blood (as from diverticulosis or colon cancer or peptic ulcer) | Synonyms: hematochezia |
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| haematocoele | (noun) swelling caused by blood collecting in a body cavity (especially a swelling of the membrane covering the testis) | Synonyms: haematocele, hematocele, hematocoele |
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| haematocolpometra | (noun) accumulation of blood in the vagina and uterus | Synonyms: hematocolpometra |
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| haematocolpos | (noun) accumulation of menstrual blood in the vagina (usually due to an imperforate hymen) | Synonyms: hematocolpos |
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| haematocrit | (noun) a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood | Synonyms: hematocrit |
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| (noun) the ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit | Synonyms: hematocrit, packed cell volume |
| haematocytopenia | (noun) an abnormally low number of red blood cells in the blood | Synonyms: hematocytopenia |
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| haematocyturia | (noun) the presence of red blood cells in the urine | Synonyms: hematocyturia |
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| haematogenesis | (noun) the formation of blood cells in the living body (especially in the bone marrow) | Synonyms: haematopoiesis, haemogenesis, haemopoiesis, hematogenesis, hematopoiesis, hemogenesis, hemopoiesis, sanguification |
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| haematogenic | (adjective) pertaining to the formation of blood or blood cells | Synonyms: haematopoietic, haemopoietic, hematogenic, hematopoietic, hemopoietic |
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| haematohiston | (noun) a colorless protein obtained by removing heme from hemoglobin; the oxygen carrying compound in red blood cells | Synonyms: globin, hematohiston |
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| haematoidin | (noun) an orange-yellow pigment in the bile that forms as a product of hemoglobin; excess amounts in the blood produce the yellow appearance observed in jaundice | Synonyms: bilirubin, hematoidin |
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| haematological | (adjective) of or relating to or involved in hematology | Synonyms: hematologic, hematological |
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| haematologist | (noun) a doctor who specializes in diseases of the blood and blood-forming organs | Synonyms: hematologist |
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| haematology | (noun) the branch of medicine that deals with diseases of the blood and blood-forming organs | Synonyms: hematology |
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| haematolysis | (noun) lysis of erythrocytes with the release of hemoglobin | Synonyms: haemolysis, hematolysis, hemolysis |
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| haematoma | (noun) a localized swelling filled with blood | Synonyms: hematoma |
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| haematopoiesis | (noun) the formation of blood cells in the living body (especially in the bone marrow) | Synonyms: haematogenesis, haemogenesis, haemopoiesis, hematogenesis, hematopoiesis, hemogenesis, hemopoiesis, sanguification |
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| haematopoietic | (adjective) pertaining to the formation of blood or blood cells | Synonyms: haematogenic, haemopoietic, hematogenic, hematopoietic, hemopoietic |
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| haematuria | (noun) the presence of blood in the urine; often a symptom of urinary tract disease | Synonyms: hematuria |
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| haemic | (adjective) relating to or containing or affecting blood | Synonyms: haematic, hematic, hemic |
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| haemitin | (noun) a complex red organic pigment containing iron and other atoms to which oxygen binds | Synonyms: haem, hematin, heme, protoheme |
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| haemodialysis | (noun) dialysis of the blood to remove toxic substances or metabolic wastes from the bloodstream; used in the case of kidney failure | Synonyms: hemodialysis |
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| haemogenesis | (noun) the formation of blood cells in the living body (especially in the bone marrow) | Synonyms: haematogenesis, haematopoiesis, haemopoiesis, hematogenesis, hematopoiesis, hemogenesis, hemopoiesis, sanguification |
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| haemoglobin | (noun) a hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues | Synonyms: Hb, hemoglobin |
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| haemoglobinemia | (noun) presence of excessive hemoglobin in the blood plasma | Synonyms: hemoglobinemia |
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| haemoglobinopathy | (noun) a blood disease characterized by the presence of abnormal hemoglobins in the blood | Synonyms: hemoglobinopathy |
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| haemoglobinuria | (noun) presence of hemoglobin in the urine | Synonyms: hemoglobinuria |
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| haemolysin | (noun) any substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobin | Synonyms: erythrocytolysin, erythrolysin, hemolysin |
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| haemolysis | (noun) lysis of erythrocytes with the release of hemoglobin | Synonyms: haematolysis, hematolysis, hemolysis |
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| haemolytic | (adjective) relating to or involving or causing hemolysis | Synonyms: hemolytic |
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| haemophile | (noun) someone who has hemophilia and is subject to uncontrollable bleeding | Synonyms: bleeder, haemophiliac, hemophile, hemophiliac |
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| haemophilia | (noun) congenital tendency to uncontrolled bleeding; usually affects males and is transmitted from mother to son | Synonyms: bleeder's disease, hemophilia |
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| haemophiliac | (noun) someone who has hemophilia and is subject to uncontrollable bleeding | Synonyms: bleeder, haemophile, hemophile, hemophiliac |
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| haemophilic | (adjective) relating to or having hemophilia | Synonyms: hemophilic |
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| haemopoiesis | (noun) the formation of blood cells in the living body (especially in the bone marrow) | Synonyms: haematogenesis, haematopoiesis, haemogenesis, hematogenesis, hematopoiesis, hemogenesis, hemopoiesis, sanguification |
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| haemopoietic | (adjective) pertaining to the formation of blood or blood cells | Synonyms: haematogenic, haematopoietic, hematogenic, hematopoietic, hemopoietic |
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| haemoproteid | (noun) related to malaria parasite and having a phase in the viscera of various birds | - |
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| haemoprotein | (noun) a conjugated protein linked to a compound of iron and porphyrin | Synonyms: hemoprotein |
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| haemoptysis | (noun) coughing up blood from the respiratory tract; usually indicates a severe infection of the bronchi or lungs | Synonyms: hemoptysis |
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| haemorrhage | (noun) the flow of blood from a ruptured blood vessel | Synonyms: bleeding, hemorrhage |
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| haemorrhagic | (adjective) of or relating to a hemorrhage | Synonyms: hemorrhagic |
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| haemorrhoid | (noun) venous swelling external or internal to the anal sphincter | Synonyms: hemorrhoid, piles |
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| haemorrhoidectomy | (noun) surgical procedure for tying hemorrhoids and excising them | Synonyms: hemorrhoidectomy |
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| haemosiderin | (noun) a granular brown substance composed of ferric oxide; left from the breakdown of hemoglobin; can be a sign of disturbed iron metabolism | Synonyms: hemosiderin |
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| haemosiderosis | (noun) abnormal deposit of hemosiderin; often a symptom of thalassemia or hemochromatosis | Synonyms: hemosiderosis |
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| haemosporidian | (noun) minute protozoans parasitic at some stage of the life cycle in blood cells of vertebrates including many pathogens | - |
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| haemostasia | (noun) surgical procedure of stopping the flow of blood (as with a hemostat) | Synonyms: haemostasis, hemostasia, hemostasis |
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| haemostasis | (noun) surgical procedure of stopping the flow of blood (as with a hemostat) | Synonyms: haemostasia, hemostasia, hemostasis |
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| haemostat | (noun) a surgical instrument that stops bleeding by clamping the blood vessel | Synonyms: hemostat |
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| haemothorax | (noun) accumulation of blood in the pleural cavity (the space between the lungs and the walls of the chest) | Synonyms: hemothorax |
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