Hemophilia

n. hereditary disorder characterized by a failure of the blood to clot normally

Haemophilia or hemophilia is the name of a family of hereditary genetic illnesses that impair the body's ability to control coagulation.
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Hemophilia is a genetic disorder—usually inherited—of the mechanism of blood clotting. [more]Hemophilia - Community and Resources

Noun
1. congenital tendency to uncontrolled bleeding; usually affects males and is transmitted from mother to son
(synonym) haemophilia, bleeder's disease
(hypernym) blood disease, blood disorder
(hyponym) hemophilia A, haemophilia A, classical hemophilia, classical haemophilia

(n.)
See Hematophilia.