一种毛颚动物门中的，细小的海生虫，有细长几乎透明的身体，嘴的两侧有镰刀形的毛须。

Any of various small, slender Marine worms of the phylum Chaetognatha having a narrow, almost transparent body and sickle-shaped bristles on each side of the mouth.

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多种相关的细长软体小动物，特别是环虫类、毛颚类、线虫类和扁形虫类；也包括许多昆虫的幼虫。

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.

youdao

多种相关的细长软体小动物，特别是环虫类、毛颚类、线虫类和扁形虫类；也包括许多昆虫的幼虫。

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.

youdao