EXPLORATORIUM

\ɛksplˌɔːɹɐtˈɔːɹi͡əm], \ɛksplˌɔːɹɐtˈɔːɹi‍əm], \ɛ_k_s_p_l_ˌɔː_ɹ_ɐ_t_ˈɔː_ɹ_iə_m]\
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1846 - Medical lexicon: a dictionary of medical science
By Robley Dunglison