caterpillar
https://gyazo.com/164ce40736f3e554a10c815e74738d4f
source: By Didier Descouens - Own work, CC BY-SA 4.0
noun
1. the larva of a butterfly or moth, having a segmented wormlike body with three pairs of true legs and several pairs of leglike appendages. Caterpillars may be hairy, have warning coloration, or be colored to resemble their surroundings.
毛虫, イモムシ〘チョウ･ガの幼虫〙
(in general use) any insect larva resembling the larvae of butterflies and moths, especially the sawfly.
2. (also caterpillar track or caterpillar tread) trademark an articulated steel band passing around the wheels of a vehicle for travel on rough ground.
｟商標｠ 〖C-〗(トラクターなどの)キャタピラー, 無限軌道(caterpillar track, caterpillar tread); キャタピラートラクター(caterpillar tractor)
a vehicle with caterpillar tracks.
ORIGIN
late 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 gatta (literally ‘cat’). Compare with French chaton, English catkin, which resembles a hairy caterpillar.