- Pathology. a quantitative deficiency of the hemoglobin, often accompanied by a reduced number of red blood cells and causing pallor, weakness, and breathlessness.
- a lack of power, vigor, vitality, or colorfulness: His writing suffers from anemia.
- a deficiency in the number of red blood cells or in their haemoglobin content, resulting in pallor, shortness of breath, and lack of energy
- lack of vitality or vigour
- pallid complexion
- the usual US spelling of anaemia
alternative (chiefly U.S.) spelling of anaemia (q.v.). See ae. As a genus of plants, Modern Latin, from Greek aneimon “unclad,” from privative prefix an- (see an- (1)) + eima “a dress, garment” (see wear (v.)).
- A pathological deficiency in the oxygen-carrying component of the blood, measured in unit volume concentrations of hemoglobin, red blood cell volume, or red blood cell number.
- A deficiency in the oxygen-carrying component of the blood, as in the amount of hemoglobin or the number or volume of red blood cells. Iron deficiency, often caused by inadequate dietary consumption of iron, and blood loss are common causes of anemia. See also aplastic anemia hemolytic anemia and sickle cell anemia.