BACTERIOLYTIC SERUM

\baktˈi͡əɹɪəlˈɪtɪk sˈɛɹəm], \baktˈi‍əɹɪəlˈɪtɪk sˈɛɹəm], \b_a_k_t_ˈiə_ɹ_ɪ__ə_l_ˈɪ_t_ɪ_k s_ˈɛ_ɹ_ə_m]\
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1920 - A practical medical dictionary.
By Stedman, Thomas Lathrop
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe