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Noun tumour has 1 sense
tumor, tumour, neoplasm - an abnormal new mass of tissue that serves no purpose--1 is a kind of growth
 --1 has particulars:
 |  | acanthoma, skin tumor; angioma; benign tumor, benign tumour, nonmalignant tumor, nonmalignant tumour, nonmalignant neoplasm; blastoma, blastocytoma, embryonal carcinosarcoma; brain tumor, brain tumour; carcinoid; celioma; granuloma; lipoma, adipose tumor; malignant tumor, malignant neoplasm, metastatic tumor; meningioma; neurofibroma, neurilemoma; neuroma; pheochromocytoma, phaeochromocytoma; pinealoma; plasmacytoma; psammoma, sand tumor; teratoma | 
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