I BLOOD GROUP SYSTEM
\a͡ɪ blˈʌd ɡɹˈuːp sˈɪstəm], \aɪ blˈʌd ɡɹˈuːp sˈɪstəm], \aɪ b_l_ˈʌ_d ɡ_ɹ_ˈuː_p s_ˈɪ_s_t_ə_m]\
Word of the day
international pitch
- the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C