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brain tumour


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Also see: brain

WordReference Random House Learner's Dictionary of American English © 2025
tu•mor /ˈtumɚ, ˈtyu-/USA pronunciation   n. [countable]
  1. Pathologyan abnormal growth of cells in animal or plant tissue.
Also,[esp. Brit.,] ˈtu•mour.  tu•mor•ous, adj. 

WordReference Random House Unabridged Dictionary of American English © 2025
tu•mor  (to̅o̅′mər, tyo̅o̅′-),USA pronunciation n. 
  1. Pathologya swollen part;
    swelling;
    protuberance.
  2. Pathologyan uncontrolled, abnormal, circumscribed growth of cells in any animal or plant tissue;
    neoplasm.
  3. [Archaic.]
    • inflated pride;
      haughtiness.
    • pompous language* bombast.
Also,[esp. Brit.,] tu′mour. 
  • Latin: a swelling, swollen state, equivalent. to tum(ēre) to swell + -or -or1
  • 1535–45
tu′mor•like′, adj. 
tu′mor•ous, tu′mor•al, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::
tumour, tumor / ˈtjuːmə/
  1. any abnormal swelling
  2. a mass of tissue formed by a new growth of cells, normally independent of the surrounding structures
Etymology: 16th Century: from Latin, from tumēre to swellˈtumorous, ˈtumoral
'brain tumour' also found in these entries (note: many are not synonyms or translations):
acoustic neuroma

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