Added 9 October 2026
tumour
noun
Latin root: tumor Wiktionary
noun Definition from Wiktionary (CC BY-SA). More about tumour at Wordnik → Where our words come from →
Origin
From Middle English tumour, from Old French tumour, from Latin tumor (“swelling”), from tumeō (“bulge, swell”, verb), from Proto-Indo-European *tewh₂- (“to swell”). Related to English thumb.
From Wiktionary, via Kaikki.org (CC BY-SA)