motorized bicycle

US /ˈmoʊtərˌaɪzd ˈbaɪsɪkl/
UK /ˈmoʊtərˌaɪzd ˈbaɪsɪkl/
"motorized bicycle" picture
1.

a bicycle fitted with a motor to assist or provide propulsion

:
He rode his motorized bicycle to work every day.
The new regulations apply to all motorized bicycles.