SUBSTITUTABLE
\sˈʌbstɪtjˌuːtəbə͡l], \sˈʌbstɪtjˌuːtəbəl], \s_ˈʌ_b_s_t_ɪ_t_j_ˌuː_t_ə_b_əl]\
Word of the day
Aerocurve
- A modification of the aeroplane, having curved surfaces, advantages which were first demonstrated by Lilienthal.