ADENOIDAL Meaning of ADENOIDAL in English adenoidal BrE AmE ˌæd ɪ ˈnɔɪd ə l ◂ -ə-, ⇨- ə n ˈɔɪd- AmE \ ˌæd ə n ˈɔɪd ə l ◂▷ adenoidal|ly i Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012