Diatonic button accordion

/dˌaɪətˈɒnɪk bˈʌtən ɐkˈɔːdiən/

/dˌaɪətˈɑːnɪk bˈʌʔn̩ ɐkˈoːɹdiən/

a type of accordion that has buttons arranged in a diatonic scale pattern, typically used in folk, traditional, and regional music styles