SIGMA FACTOR
\sˈɪɡmə fˈaktə], \sˈɪɡmə fˈaktə], \s_ˈɪ_ɡ_m_ə f_ˈa_k_t_ə]\
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"