Sickle Definition–noun | 1. | an implement for cutting grain, grass, etc., consisting of a curved, hooklike blade mounted in a short handle. | | 2. | (initial capital letter ) Astronomy. a group of stars in the constellation Leo, likened to this implement in formation. | |
From Dictionary
Cell Definition–noun | 1. | a small room, as in a convent or prison. | | 2. | any of various small compartments or bounded areas forming part of a whole. | | 3. | a small group acting as a unit within a larger organization: a local cell of the Communist party. | | 4. | Biology. a usually microscopic structure containing nuclear and cytoplasmic material enclosed by a semipermeable membrane and, in plants, a cell wall; the basic structural unit of all organisms. | | 5. | Entomology. one of the areas into which the wing of an insect is divided by the veins. | | 8. | Also called electrolytic cell. Physical Chemistry. a device for producing electrolysis, consisting essentially of the electrolyte, its container, and the electrodes. | | 9. | Aeronautics. the gas container of a balloon. | | 10. | Ecclesiastical. a monastery or nunnery, usually small, dependent on a larger religious house. | –verb (used without object) | 12. | to live in a cell: The two prisoners had celled together for three years. | |
From Dictionary
Anemia Definition–noun | 1. | Pathology. a quantitative deficiency of the hemoglobin, often accompanied by a reduced number of red blood cells and causing pallor, weakness, and breathlessness. | | 2. | a lack of power, vigor, vitality, or colorfulness: His writing suffers from anemia. | |
From Dictionary
Related topics from Britannicasickle cell anemia
hereditary disease that destroys red blood cells by causing them to take on a rigid "sickle" shape. The disease is characterized by many of the symptoms of chronic anemia (fatigue, pale skin, and ...
anemia
condition in which the red blood cells (erythrocytes) are reduced in number or volume or are deficient in hemoglobin, their oxygen-carrying pigment. The most noticeable outward symptom of anemia is ...
erythrocyte
cellular component of blood, millions of which in the circulation of vertebrates give the blood its characteristic colour and carry oxygen from the lungs to the tissues. The mature human erythrocyte ...
Neel, James Van Gundia
American geneticist (b. March 22, 1915, Hamilton, Ohio-d. Feb. 1, 2000, Ann Arbor, Mich.), was a pioneer in the field of genetics; his studies provided evidence of the genetic basis of numerous ...
reproductive system disease
Priapism is prolonged penile erection that is painful and unassociated with sexual stimulation. The blood in the spaces of the corpora cavernosa becomes sludgelike and may remain for hours or even ...
Herrick, James Bryan
American physician and clinical cardiologist who was the first to observe and describe sickle-cell anemia.hemoglobinopathy
any of a group of disorders caused by the presence of variant hemoglobin in the red blood cells. Variant-hemoglobin disorders occur geographically throughout the Old World in a beltlike area roughly ...
infectious disease
Streptococcus pneumoniae (pneumococcus) is the most frequent cause of bloodstream infection, pneumonia, and ear infection and is the third most common cause of bacterial meningitis in children. ...
Ingram, Vernon Martin
American biochemist (b. May 19, 1924, Breslau, Ger. [now Wroclaw, Pol.]-d. Aug. 17, 2006, Boston, Mass.), was hailed as the father of molecular medicine for having discovered in the mid-1950s that ...
hemoglobin
iron-containing protein in the blood of many animals-in the red blood cells (erythrocytes) of vertebrates-that transports oxygen to the tissues. Hemoglobin forms an unstable, reversible bond with ...
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