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
distinguished service cross
- a United States Army decoration for extraordinary heroism against an armed enemy