《英文msh詞典》Tooth,Primary
[同義詞] Tooth,Primary
[主題詞] Tooth,Deciduous
[中文釋義] 牙,初生
[英文釋義] The 20 teeth of the first dentition,which are shed and replaced by the permanent teeth,usually by the age of six years. All deciduous teeth are normally expected to erupt by the age of two and a half years.