Centrifugal
Part of speech: adjective
Definition: Tending, or causing, to recede from the center. Expanding first at the summit, and later at the base, as a flower cluster. Having the radicle turned toward the sides of the fruit, as some embryos.
Motor
Part of speech: adjective
Definition: describing neurons that create the ability to move
Part of speech: verb
Definition: to drive around leisurely in a motorised vehicle.
Part of speech: noun
Definition: A machine or device that converts any form of energy into mechanical energy, or imparts motionA motor car, or automobile
Example sentence: Stem cell research is the key to developing cures for degenerative conditions like Parkinson's and motor neuron disease from which I and many others suffer. The fact that the cells may come from embryos is not an objection, because the embryos are going to die anyway.