SELF-DEFENCE
\sˈɛlfdɪfˈɛns], \sˈɛlfdɪfˈɛns], \s_ˈɛ_l_f_d_ɪ_f_ˈɛ_n_s]\
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Word of the day
international pitch
- the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C