undercarriage

/ˈʌndərˌkɛrɪdʒ/
noun
  1. The supporting structure underneath a vehicle, including the wheels, axles, and frame.
    • The mechanic inspected the undercarriage for rust and damage after the winter season.
    • A rock hit the undercarriage of the car, causing a loud scraping noise.
    • The truck's undercarriage was reinforced to handle rough off-road terrain.
  2. The landing gear of an aircraft, including wheels, struts, and related components.
    • The pilot lowered the undercarriage as the plane approached the runway.
    • The ground crew checked the undercarriage for any debris before takeoff.
    • A problem with the undercarriage forced the jet to make an emergency landing.
  3. The underside or lower part of an object or structure.
    • The robot's undercarriage housed the battery and wiring.
    • The undercarriage of the bridge was covered in graffiti.
    • We crawled under the house to examine the undercarriage of the old porch.
Antonyms