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
dust storm
- a windstorm that lifts up clouds of dust or sand a windstorm that lifts up clouds dust or sand; "it was the kind of duster not experienced in years"