FIRSTCLASS

\fˈɜːstklas], \fˈɜːstklas], \f_ˈɜː_s_t_k_l_a_s]\
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1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald

Word of the day

international pitch

  • the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C
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