QUADRASONIC Meaning of QUADRASONIC in English quadrasonic BrE AmE ˌkwɒdr ə ˈsɒn ɪk ◂ AmE \ ˌkwɑːdr ə ˈsɑːn ɪk ◂▷ quadrasonic|ally ə l‿i▷ quadrasonic|s s Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012