【上位】 any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae 特に環形動物門、毛顎動物門、線形動物門、ひも形動物門、および扁形動物門の、数々の比較的小型の細長く柔らかい体をした動物。また、多くの昆虫幼虫。
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