POLAR ZONE
\pˈə͡ʊlə zˈə͡ʊn], \pˈəʊlə zˈəʊn], \p_ˈəʊ_l_ə z_ˈəʊ_n]\
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By Princeton University
Word of the day
international pitch
- the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C