CONCAVO-CONVEX
\kənkˈɑːvə͡ʊkɒnvˈɛks], \kənkˈɑːvəʊkɒnvˈɛks], \k_ə_n_k_ˈɑː_v_əʊ_k_ɒ_n_v_ˈɛ_k_s]\
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"