| 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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