un ‧ der ‧ side /ˈʌndəsaɪd $ -ər-/ BrE AmE noun [singular]
the underside (of something) the bottom side or surface of something:
The leaves are green on top and silvery on the underside.
un ‧ der ‧ side /ˈʌndəsaɪd $ -ər-/ BrE AmE noun [singular]
the underside (of something) the bottom side or surface of something:
The leaves are green on top and silvery on the underside.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012