BUTTONHOLE OPERATION
\bˈʌtənhˌə͡ʊl ˌɒpəɹˈe͡ɪʃən], \bˈʌtənhˌəʊl ˌɒpəɹˈeɪʃən], \b_ˈʌ_t_ə_n_h_ˌəʊ_l ˌɒ_p_ə_ɹ_ˈeɪ_ʃ_ə_n]\
Definitions of BUTTONHOLE OPERATION
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By Willam Alexander Newman Dorland