EPILEPTOGENIC ZONE

\ˌɛpɪlˌɛptə͡ʊd͡ʒˈɛnɪk zˈə͡ʊn], \ˌɛpɪlˌɛptə‍ʊd‍ʒˈɛnɪk zˈə‍ʊn], \ˌɛ_p_ɪ_l_ˌɛ_p_t_əʊ_dʒ_ˈɛ_n_ɪ_k z_ˈəʊ_n]\
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1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe