EXTERNAL ABDOMINAL RING

\ɛkstˈɜːnə͡l abdˈɒmɪnə͡l ɹˈɪŋ], \ɛkstˈɜːnə‍l abdˈɒmɪnə‍l ɹˈɪŋ], \ɛ_k_s_t_ˈɜː_n_əl a_b_d_ˈɒ_m_ɪ_n_əl ɹ_ˈɪ_ŋ]\
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1920 - A practical medical dictionary.
By Stedman, Thomas Lathrop
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe