SPECTROLOGY

\spɛktɹˈɒləd͡ʒi], \spɛktɹˈɒləd‍ʒi], \s_p_ɛ_k_t_ɹ_ˈɒ_l_ə_dʒ_i]\
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2010 - New Age Dictionary Database
By Oddity Software
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe