histiocytoma
noun
his·tio·cy·to·ma
| \ ˌhis-tē-ō-sī-ˈtō-mə
\
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plural histiocytomas
also histiocytomata\ -mət-ə
\
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Medical Definition of histiocytoma
: a tumor that consists predominantly of macrophages
a malignant fibrous histiocytoma of the spleen