(informal) A policeman driving a motorcycle.

plural of motor oil

(neurology) A neuron with its associated muscle fibres.

plural of electric motor

plural of motor scooter

A small motorcycle or moped with a step-through frame.

(biochemistry) Any of a class of proteins that are able to move on a suitable substrate, being powered by the hydrolysis of ATP, and are involved in the conversion of chemical energy into mechanical work.

A motor-driver van. / A motorhome.

plural of motor-van

motel