HUBBLE CONSTANT
\hˈʌbə͡l kˈɒnstənt], \hˈʌbəl kˈɒnstənt], \h_ˈʌ_b_əl k_ˈɒ_n_s_t_ə_n_t]\
Word of the day
international pitch
- the pitch used to tune instruments for concert performances; usually assigns 440 Hz A above middle C