# tumor

Pronunciation: US say "TOO-mur" /tuː.məɹ/; UK say "TYOO-muh" /tjuː.mə/

## Noun

1. An abnormal mass or swelling in the body, which on diagnosis may prove to be a neoplasm, an abscess, or tissue metaplasia.
   - Simple: An unusual lump of body tissue that grows where it should not.
   - _After removing the tumor, the surgeon sent it to the lab for analysis._
   - _Some tumors stay harmless, while others spread to surrounding organs._

## Origin

From Middle English tumour, borrowed through Old French tumour from Latin tumor ("swelling"), which came from the verb tumeō ("to bulge, swell"). This traces back through Proto-Italic to a Proto-Indo-European root *tewh₂- ("to swell"), and is related to English thumb.

Source: DictionaryAI, https://dictionaryai.com/define/tumor (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).