英语释义
1. polycythemia of unknown cause that is marked by increase in total blood volume and accompanied by nosebleed, distension of the circulatory vessels, and enlargement of the spleen — called also erythremia
2. chronic polycythemia that is a myeloproliferative disorder of unknown cause characterized by an increase in total blood volume and viscosity and typically accompanied by nosebleed, headache, dizziness, weakness, itchy skin, reddish complexion, distension of the circulatory vessels, and enlargement of the spleen — called also erythremia, erythrocythemia, Vaquez's disease