PRINCIPAL FOCUS

\pɹˈɪnsɪpə͡l fˈə͡ʊkəs], \pɹˈɪnsɪpə‍l fˈə‍ʊkəs], \p_ɹ_ˈɪ_n_s_ɪ_p_əl f_ˈəʊ_k_ə_s]\
Sort: Oldest first
 
1920 - A practical medical dictionary.
By Stedman, Thomas Lathrop
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe