Definition of caseation in US English:

caseation

noun

Medicine
  • A form of necrosis characteristic of tuberculosis, in which diseased tissue forms a firm, dry mass like cheese in appearance.

    • ‘Excessive fibrosis rather than caseation is the dominating feature.’
    • ‘Necrosis may be seen, however caseation is usually not present.’
    • ‘Granulomas, with or without caseation, may also be found.’
    • ‘Biopsy from a peritoneal granuloma showed caseation necrosis and acid-fast bacilli.’
    • ‘Both caseation and calcification are highly suggestive of a tubercular etiology, neither being common in malignancy related lymphadenopathy.’

Origin

Mid 19th century: from medieval Latin caseatio(n-), from Latin caseus ‘cheese’.

Pronunciation

caseation

/ˌkāsēˈāSHən/