单词	collar cell
释义	collar cell noun : a flagellated endodermal cell that lines the cavity of a sponge and has a contractile protoplasmic cup surrounding the flagellum called also choanocyte Word History First Known Use circa 1889, in the meaning defined above
随便看	oregons orei oreide oreides orejones Orejón Orel oreless Orem Orenburg orenda Orense Oreo Oreocarya oreodon oreodont Oreodontidae oreodonts Oreodoxa oreoes oreography oreophasine Oreophasis oreopteres oreopterises

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