essential thrombocytopeniaiˈsenʃəlˌθrɔmbəusaitəuˈpi:niə 基本英英 原发性血小板减少症,特发性血小板减少性紫癜 Noun: the primary form of thrombocytopenia rather than a shortage of platelets caused by other conditions such as tuberculosis or chemical suppression of bone marrow etc.