FILIAL DUTY
\fˈɪlɪəl djˈuːti], \fˈɪlɪəl djˈuːti], \f_ˈɪ_l_ɪ__ə_l d_j_ˈuː_t_i]\
Word of the day
international pitch
- the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C