PROXIMATE PRINCIPLE

\pɹˈɒksɪmˌe͡ɪt pɹˈɪnsɪpə͡l], \pɹˈɒksɪmˌe‍ɪt pɹˈɪnsɪpə‍l], \p_ɹ_ˈɒ_k_s_ɪ_m_ˌeɪ_t p_ɹ_ˈɪ_n_s_ɪ_p_əl]\
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1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe