-ˌheməˈrajə̇kə noun
Etymology: New Latin, literally, hemorrhagic purpura
1. : a condition of unknown cause that is characterized by bleeding into the skin with the production of petechiae or ecchymoses and by hemorrhages into mucous membranes and other tissues and that is associated with a reduction in circulating blood platelets and prolonged bleeding time
2. : an acute or subacute toxemic state in horses that is commonly secondary to an infectious disease and is characterized by dropsical swellings of the legs, abdomen, and head and by small purple hemorrhages in these swellings and in the mucous membranes — called also petechial fever