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

 

adenoidal

 adjective
adjective
BrE BrE//ˌædəˈnɔɪdl//
 
; NAmE NAmE//ˌædəˈnɔɪdl//
 
 
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connected with the adenoids an adenoidal voice (= one that sounds as though you are talking through your nose, caused by adenoids swelling)