1824, from French medical term (1761), Modern Latin, from Greek anaimia "lack of blood," from anaimos "bloodless," from an- "without" (see an- (1)) + haima "blood" (see -emia).
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 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 anemiahemolytic anemia and sickle cell anemia.
Because people suffering from anemia often appear weak and pale, the term is frequently used to describe general apathy or weakness: “The team's performance has been pretty anemic these past few weeks.”