PERSPICUOUSNESS

\pəspˈɪkjuːəsnəs], \pəspˈɪkjuːəsnəs], \p_ə_s_p_ˈɪ_k_j_uː_ə_s_n_ə_s]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1871 - The Cabinet Dictionary of the English Language