hemangioendothelioma he·man·gi·o·en·do·the·li·o·ma (hĭ-mān'jē-ō-ěn'dō-thē'lē-ō'mə)
n.
A neoplasm derived from blood vessels, characterized by numerous prominent endothelial cells that occur singly or in aggregates and line vascular tubes or channels.
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| the offspring of a zebra and a donkey. |
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