OPTICAL BENCH

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