caterpillar caterpillar /ˈkætɝˌpɪlɝ/

noun

1. () A wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth  ( caterpillar )
   a wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth
    The caterpillar crawled along the stem, munching on a leaf
   The caterpillar crawled along the stem, munching on a leaf
   
   

 Caterpillar

1. A large tracked vehicle that is propelled by two endless metal belts; frequently used for moving earth in construction and farm work  ( cat , Caterpillar )
   a large tracked vehicle that is propelled by two endless metal belts; frequently used for moving earth in construction and farm work