anaemia

n. lack of red blood cells, loss of blood (Medicine)

This article discusses the medical condition. For the fern genus, see Anemia (fern)Anemia (AmE) or anæmia/anaemia (BrE), from the Greek (an-haîma) meaning "without blood", is a deficiency of red blood cells (RBCs) and/or hemoglobin. This results in a reduced ability of blood to transfer oxygen to the tissues, causing tissue hypoxia. Since all human cells depend on oxygen for survival, varying degrees of anemia can have a wide range of clinical consequences. Hemoglobin (the oxygen-carrying protein in the red blood cells) has to be present to ensure adequate oxygenation of all body tissues and organs. The three main classes of anemia include excessive blood loss (acutely such as a hemorrhage or chronically through low-volume loss), excessive blood cell destruction (hemolysis) or deficient red blood cell production (ineffective hematopoiesis). In menstruating women, dietary iron deficiency is a common cause of deficient red blood cell production.
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Anemia /ane·mia/ reduction below normal of the number of erythrocytes, quantity of hemoglobin, or the volume of packed red cells in the blood; a [more]Anaemia - Community and Resources

Noun
1. a lack of vitality
(synonym) anemia
(hypernym) symptom
2. a deficiency of red blood cells
(synonym) anemia
(hypernym) blood disease, blood disorder
(hyponym) aplastic anemia, aplastic anaemia

(a.)
A morbid condition in which the blood is deficient in quality or in quantity.