ULTRAMICROSCOPE

\ˌʊltɹɐmˈa͡ɪkɹəskˌə͡ʊp], \ˌʊltɹɐmˈa‍ɪkɹəskˌə‍ʊp], \ˌʊ_l_t_ɹ_ɐ_m_ˈaɪ_k_ɹ_ə_s_k_ˌəʊ_p]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd