Gear case

noun

Definitions

Noun
  1. 1
    An enclosure for the bicycle chain and sprocket assemblages commonly employed by utility bicycles. It protects the chain from mud and dirt and may also contain an oil bath to keep the chain lubricated.
  2. 2
    the shell (metal casing) in which a train of gears is sealed wordnet

Next best steps

Mini challenge

Unscramble this word: gearcase