OLFACTORY REGION

\ɒlfˈaktəɹˌi ɹˈiːd͡ʒən], \ɒlfˈaktəɹˌi ɹˈiːd‍ʒən], \ɒ_l_f_ˈa_k_t_ə_ɹ_ˌi ɹ_ˈiː_dʒ_ə_n]\
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1898 - Warner's pocket medical dictionary of today.
By William R. Warner
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe