Alternative form of roller mill

Any contact between rotating bodies such that the relative velocity of the two contacting surfaces is zero at the point of contact.

plural of barrel roll

(aviation) An aerobatic flying maneuver in which the pilot causes the airplane to complete one loop in the same time that the airplane completes one roll, creating the appearance that the airplane is riding on the inside of a cylinder.

(informal) Let's go; used to suggest that a plan should be put into action.

Alternative spelling of rock and roll

Having a top that rolls away when not needed.

The record, kept by a manorial court, of the property held by tenants and the rent paid; physically a continuous roll of parchment documents stitched together.

plural of California roll

(automotive) A frame built in or around the driver and passenger compartment of a vehicle to protect its occupants from being injured in an accident, particularly if the vehicle rolls over.