1. <oncology> An abnormal mass of tissue that results from excessive cell division that is uncontrolled and progressive, also called a neoplasm. Tumours perform no useful body function. They may be either benign (not cancerous) or malignant.
Origin: L. Tumere = to swell
American spelling: tumor
(12 May 1997)
|Bookmark with:||word visualiser||Go and visit our forums|