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The Collaborative International Dictionary
Caseation

Caseation \Ca`se*a"tion\, n. [Cf. F. cas['e]ation. See Casein.] (Med.) A degeneration of animal tissue into a cheesy or curdy mass.

Wiktionary
caseation

n. (context pathology English) A necrotic degeneration of tissue to a cheese-like condition