Definition of colonic adjective from the Oxford Advanced Learner's Dictionary

 

colonic

 adjective
adjective
BrE BrE//ˈlɒnɪk//
 
; NAmE NAmE//ˈlɑːnɪk//
 
(anatomy)
 
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connected with the colon (= part of the bowels) colonic irrigation (= the process of washing out the colon with water)
See the Oxford Advanced American Dictionary entry: colonic