Which of the following medical terms refers to uncontrolled blood loss?

The term that refers to uncontrolled blood loss is hemophilia. This genetic disorder affects the body's ability to control blood clotting, leading to excessive bleeding even from minor injuries. Individuals with hemophilia lack certain clotting factors necessary to form a stable blood clot, which can result in spontaneous bleeding episodes or prolonged bleeding after an injury.

The other medical terms do not denote uncontrolled blood loss. Anemia refers to a condition where there is a deficiency of red blood cells or hemoglobin in the blood, which can result from various causes but is not characterized by uncontrolled bleeding. Hyperlipidemia involves elevated levels of lipids in the blood, which is unrelated to bleeding. Thrombocytopenia, while it refers to a low platelet count that may increase the risk of bleeding, does not specifically imply uncontrolled blood loss in the same way hemophilia does.