NUMBER SYSTEM

\nˈʌmbə sˈɪstəm], \nˈʌmbə sˈɪstəm], \n_ˈʌ_m_b_ə s_ˈɪ_s_t_ə_m]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd