sickle cell(redirected from crescent cell)
Also found in: Thesaurus, Medical.
Related to crescent cell: sickle cell trait, crescent cell anemia
An abnormal, crescent-shaped red blood cell that results from a single change in the amino acid sequence of the cell's hemoglobin, which causes the cell to contort, especially under low-oxygen conditions.
an elongated, often sickle-shaped red blood cell, caused by defective hemoglobin.