POSTERO-EXTERNAL COLUMN

\pə͡ʊstˈe͡əɹə͡ʊɛkstˈɜːnə͡l kˈɒlʌm], \pə‍ʊstˈe‍əɹə‍ʊɛkstˈɜːnə‍l kˈɒlʌm], \p_əʊ_s_t_ˈeə_ɹ_əʊ_ɛ_k_s_t_ˈɜː_n_əl k_ˈɒ_l_ʌ_m]\
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1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe