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caterpillar noun

  /ˈkætəˌpɪlə/ , /ˈkætəˌpɪlɚ/ , /ˈkætɚˌpɪlɚ/
  • The larva of a butterfly or moth; leafworm.
  • (maths) A set of subtrees of a tree.
毛虫, 芋虫
  • A vehicle with a caterpillar track; a crawler.
キャタピラ, 無限軌道
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