BACILLUS BUTYRICUS

\bˈasɪləs bjuːtˈɪɹɪkəs], \bˈasɪləs bjuːtˈɪɹɪkəs], \b_ˈa_s_ɪ_l_ə_s b_j_uː_t_ˈɪ_ɹ_ɪ_k_ə_s]\
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1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe