OPTICAL GLASS

\ˈɒptɪkə͡l ɡlˈas], \ˈɒptɪkə‍l ɡlˈas], \ˈɒ_p_t_ɪ_k_əl ɡ_l_ˈa_s]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd