1. Plural of polycythaemia; conditions characterized by an abnormally high number of red blood cells in the blood.
Usage: Medical/clinical term; British spelling; American equivalent is 'polycythemias'; Typically used in medical contexts

Examples

• The patient was diagnosed with one of several polycythaemias affecting red blood cell production.
• Polycythaemias can result from either primary bone marrow disorders or secondary causes such as chronic hypoxia.
• The hematologist explained that polycythaemias increase the risk of thrombosis and cardiovascular complications.
• Treatment options for polycythaemias depend on whether the condition is primary or secondary in nature.
• Patients with polycythaemias require regular monitoring of their blood cell counts and viscosity.