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lymphoma lym·pho·ma (lĭm-fō'mə)
n. pl. lym·pho·mas or lym·pho·ma·ta (-mə-tə)
Any of various usually malignant neoplasms of lymphatic and reticuloendothelial tissues that occur as circumscribed solid tumors and that are composed of cells that resemble lymphocytes, plasma cells, or histiocytes. Also called malignant lymphoma.
Plural lymphomas or lymphomata (lĭm-fō'mə-tə)
Any of various usually malignant tumors that arise in the lymph nodes or other lymphatic tissues, often manifested by painless enlargement of one or more lymph nodes. See also Hodgkin's disease.