Definition of Crohn’s disease noun from the Oxford Advanced Learner's Dictionary

 

Crohn’s disease

 noun
noun
BrE BrE//ˈkrəʊnz dɪziːz//
 
; NAmE NAmE//ˈkroʊnz dɪziːz//
 
[uncountable]
 
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a disease affecting the lower intestines, in which they develop many sore areas. The disease lasts for many years and is difficult to cure. Word Origin 1930s: named after Burrill B. Crohn (1884–1983), American pathologist, who was among the first to describe it.
See the Oxford Advanced American Dictionary entry: Crohn’s disease