loop

A length of thread, line or rope that is doubled over to make an opening.

The opening so formed.

A shape produced by a curve that bends around and crosses itself.

A ring road or beltway.

An endless strip of tape or film allowing continuous repetition.

A complete circuit for an electric current.

A programmed sequence of instructions that is repeated until or while a particular condition is satisfied.

An edge that begins and ends on the same vertex.

A path that starts and ends at the same point.

A bus or rail route, walking route, etc. that starts and ends at the same point.

A place at a terminus where trains or trams can turn round and go back the other way without having to reverse; a balloon loop, turning loop, or reversing loop.

A quasigroup with an identity element.

A loop-shaped intrauterine device.

An aerobatic maneuver in which an aircraft flies a circular path in a vertical plane.

A small, narrow opening; a loophole.

A flexible region in a protein's secondary structure.