hemangioendothelioma

noun
he·​man·​gio·​en·​do·​the·​li·​o·​ma
variants: or chiefly British haemangioendothelioma \ -​jē-​ō-​ˌen-​dō-​ˌthē-​lē-​ˈō-​mə \
plural hemangioendotheliomas also hemangioendotheliomata\ -​mət-​ə \

Medical Definition of hemangioendothelioma 

: an often malignant tumor originating by proliferation of capillary endothelium

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