Term: perpetual motion: motion that continues indefinitely without any external source of energy; impossible in practice because of friction
Broader: motion: a state of change | Unrelated: flat tip screwdriver: a screwdriver with a flat wedge-shaped tip that fits into a slot in the head of a screw
Broader: motion: a state of change | Unrelated: imposition: the act of imposing something (as a tax or an embargo)
Broader: motion: a state of change | Unrelated: northern phalarope: breeds in Arctic regions of Old and New Worlds; large flocks often seen far out at sea
Broader: motion: a state of change | Unrelated: effigy: a representation of a person (especially in the form of sculpture)
Broader: motion: a state of change | Unrelated: updating: the act of changing something to bring it up to date (usually by adding something)
Broader: motion: a state of change | Unrelated: grey sole: greyish-white flesh of a flatfish
Broader: motion: a state of change | Unrelated: spearmint oil: an aromatic oil obtained from the spearmint plant
Broader: motion: a state of change | Unrelated: fennel: leaves used for seasoning
Broader: motion: a state of change | Unrelated: two-by-four: a timber measuring (slightly under) 2 inches by 4 inches in cross section
Broader: motion: a state of change | Unrelated: forcemeat: mixture of ground raw chicken and mushrooms with pistachios and truffles and onions and parsley and lots of butter and bound with eggs