Any of various parasitic and nonparasitic worms of the phylum Platyhelminthes,such as a tapeworm or a planarian,characteristically having a soft,flat,bilaterally symmetrical body and no body cavity.

 
  • 扁虫扁形动物门的寄生或非寄生虫中的任一种,以具有柔软、扁平且两面对称的身体和无体腔为特征,如绦虫或涡虫。
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