VALVULOTOMY

\vˌalvjʊlˈɒtəmɪ], \vˌalvjʊlˈɒtəmɪ], \v_ˌa_l_v_j_ʊ_l_ˈɒ_t_ə_m_ɪ]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe