单词 | Polycladida |
释义 | Polycladidaplural noun Poly·clad·i·da ˌpälēˈkladədə, -lə̇ˈk- : an order of Turbellaria comprising broad flattened often brightly colored marine flatworms in which the alimentary tract has many primary branches radiating from a central cavity, the ovaries and testes are numerous, and no vitellarium is developed |
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