UNDERCARRIAGE
Meaning of UNDERCARRIAGE in English
un ‧ der ‧ car ‧ riage /ˈʌndəˌkærɪdʒ $ -ər-/ BrE AmE noun [countable]
the wheels of an aircraft, train etc and the structure that holds them
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012