PERMIAN PERIOD

\pˈɜːmi͡ən pˈi͡əɹɪəd], \pˈɜːmi‍ən pˈi‍əɹɪəd], \p_ˈɜː_m_iə_n p_ˈiə_ɹ_ɪ__ə_d]\
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2011 - English Dictionary Database
By DataStellar Co., Ltd
 
2006 - WordNet 3.0
By Princeton University