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.