UNBELIEVABLE
\ʌnbɪlˈiːvəbə͡l], \ʌnbɪlˈiːvəbəl], \ʌ_n_b_ɪ_l_ˈiː_v_ə_b_əl]\
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By Princeton University
Word of the day
Aerocurve
- A modification of the aeroplane, having curved surfaces, advantages which were first demonstrated by Lilienthal.