REFLECTING CIRCLE
\ɹɪflˈɛktɪŋ sˈɜːkə͡l], \ɹɪflˈɛktɪŋ sˈɜːkəl], \ɹ_ɪ_f_l_ˈɛ_k_t_ɪ_ŋ s_ˈɜː_k_əl]\
Word of the day
international pitch
- the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C