CONCAVOCONVEX LENS
\kənkˈavəkˌɒnvɛks lˈɛnz], \kənkˈavəkˌɒnvɛks lˈɛnz], \k_ə_n_k_ˈa_v_ə_k_ˌɒ_n_v_ɛ_k_s l_ˈɛ_n_z]\
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"