What does antitumour mean?
Antitumour is a British English adjective describing something that prevents, inhibits, or counteracts the growth of tumours. It is used almost entirely within medicine, pharmacology, and scientific research, where it characterises drugs, natural compounds, or therapies that show effectiveness against abnormal tissue growth. A researcher might describe a substance's 'antitumour activity', or clinicians might refer to an 'antitumour agent' when discussing treatment options. The word carries a precise, technical connotation and is rarely encountered outside professional or academic contexts; lay readers are more likely to meet it in news coverage of cancer research than in casual conversation. The corresponding American spelling is 'antitumor', which drops the 'u' in line with standard US orthographic conventions for this word family. The term derives from the prefix 'anti-' combined with 'tumour', itself from the Latin 'tumere', meaning to swell. Its usefulness lies in its specificity: unlike broader terms such as 'anticancer', it pinpoints the inhibition of tumour growth itself.
adjectivePreventing or inhibiting the growth of tumours; used chiefly in medical and pharmacological contexts to describe drugs, compounds, or treatments that counteract tumour development.
- Describing agents or treatments that inhibit or prevent the growth of tumours.
"The new compound showed significant antitumour activity in early clinical trials."
"Researchers reported that the extract exhibited potent antitumour properties in laboratory studies."
"The patient was prescribed an antitumour drug as part of her chemotherapy regimen."
The only thing separating 'antitumour' from 'antitumor' is an ocean — British scientists keep the 'u', American ones drop it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of antitumour
The word combines the Greek-derived prefix 'anti-' (against) with 'tumour', which comes from the Latin 'tumor', meaning a swelling, from the verb 'tumere' (to swell). The same Latin root gives English related medical terms such as 'tumescent' and 'tumid'. The '-our' spelling reflects standard British conventions, while American usage renders the word as 'antitumor'. The compound form arose in modern medical literature as oncology developed as a distinct field.
Related word forms
How antitumour is actually used
This is the standard British spelling; American English uses 'antitumor'. The word appears almost exclusively in formal medical, scientific, and pharmacological writing rather than everyday conversation.
Easily confused with antitumour
'Anticancer' is a broader term covering all aspects of fighting cancer, while 'antitumour' specifically refers to inhibiting the growth of tumours themselves.