a small creature like a worm with legs that develops into a butterfly or moth (= flying insects with large, sometimes brightly coloured, wings). Caterpillars eat the leaves of plants. 蠋,毛虫(蝴蝶或蛾的幼虫) Topics Insects, worms, etc.c1Word Originlate Middle English: perhaps from a variant of Old French chatepelose, literally ‘hairy cat’, influenced by obsolete piller ‘ravager’. The association with “cat” is found in other languages, e.g. Swiss German Teufelskatz (literally ‘devil's cat’), Lombard (an Italian dialect spoken in northern Italy) gatta (literally ‘cat’). Compare with French chaton, English catkin, which resembles a hairy caterpillar.