SPHENOIDAL FONTANEL

\sfˈɛnɔ͡ɪdə͡l fˈɒnte͡ɪnə͡l], \sfˈɛnɔ‍ɪdə‍l fˈɒnte‍ɪnə‍l], \s_f_ˈɛ_n_ɔɪ_d_əl f_ˈɒ_n_t_eɪ_n_əl]\
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2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe