The story
From hemangio- (“blood vessel”) + endothelio- (“endothelium”) + blastoma (“a tumour that is caused by malignancies in precursor cells or blasts”).
Etymology from Wiktionary, CC BY-SA 4.0.
hemangioendothelioblastoma
Today it means: A rare tumor composed of cells with characteristics of both endothelial cells and primitive cells, typically found in the liver or other soft tissues of the body. Full definition →