SUBSTITUTION THERAPY
\sˌʌbstɪtjˈuːʃən θˈɛɹəpi], \sˌʌbstɪtjˈuːʃən θˈɛɹəpi], \s_ˌʌ_b_s_t_ɪ_t_j_ˈuː_ʃ_ə_n θ_ˈɛ_ɹ_ə_p_i]\
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Word of the day
Aerocurve
- A modification of the aeroplane, having curved surfaces, advantages which were first demonstrated by Lilienthal.