PRION Meaning of PRION in English I prion bird BrE AmE ˈpraɪ ɒn AmE -ɑːn▷ prion|s z II prion infectious particle BrE AmE ˈpriː ɒn ˈpraɪ- AmE -ɑːn▷ prion|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012