SPECTROSCOPICAL

\spˌɛktɹəskˈɒpɪkə͡l], \spˌɛktɹəskˈɒpɪkə‍l], \s_p_ˌɛ_k_t_ɹ_ə_s_k_ˈɒ_p_ɪ_k_əl]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd