SPECTROLOGICAL

\spˌɛktɹəlˈɒd͡ʒɪkə͡l], \spˌɛktɹəlˈɒd‍ʒɪkə‍l], \s_p_ˌɛ_k_t_ɹ_ə_l_ˈɒ_dʒ_ɪ_k_əl]\
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1914 - Nuttall's Standard dictionary of the English language
By Nuttall, P.Austin.