CONCAVE POLYHEDRON
\kɒnkˈe͡ɪv pˌɒlɪhˈiːdɹən], \kɒnkˈeɪv pˌɒlɪhˈiːdɹən], \k_ɒ_n_k_ˈeɪ_v p_ˌɒ_l_ɪ_h_ˈiː_d_ɹ_ə_n]\
Word of the day
Mustagh Range
- a mountain range in northern Kashmir; an extension of the Hindu Kush; contains 2nd highest peak