PETROLOGY
\pɛtɹˈɒləd͡ʒi], \pɛtɹˈɒlədʒi], \p_ɛ_t_ɹ_ˈɒ_l_ə_dʒ_i]\
Word of the day
international pitch
- the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C