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.

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。

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The S-type lectins in annelida are different in molecular structure and biochemical properties from that of common galectin and are valuable in anticancer study.

环节动物的S型凝集素在结构和生化性质上都有别于一般的S型凝集素，其在抗癌等研究方面的潜在价值重大。

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