eu·the·ri·an /jʊˈθɪriən/
  eu·the·ri·an /-ɪən/ 形容詞 名詞
  真哺乳亞綱的(動物)
  eutherian
       adj : of or relating to or belonging to the subclass Eutheria;
             "eutherian mammals"
       n : mammals having a placenta; all mammals except monotremes and
           marsupials [syn: placental, placental mammal, eutherian
           mammal]