fastener consisting of a metal ring for lining a small hole to permit the attachment of cords or lines

anything with a round or oval shape (formed by a curve that is closed and does not intersect itself)

(computer science) a single execution of a set of instructions that are to be repeated

an inner circle of advisors (especially under President Reagan)

the basic pattern of the human fingerprint

a computer program that performs a series of instructions repeatedly until some specified condition is satisfied

the topology of a network whose components are serially connected in such a way that the last component is connected to the first component

an intrauterine device in the shape of a loop

a complete electrical circuit around which current flows or a signal circulates

a flight maneuver; aircraft flies a complete circle in the vertical plane