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A length of thread, line or rope that is doubled over to make an opening.
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The opening so formed.
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A shape produced by a curve that bends around and crosses itself.
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Arches, loops, and whorls are patterns found in fingerprints.
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A ring road or beltway.
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An endless strip of tape or film allowing continuous repetition.
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A complete circuit for an electric current.
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A programmed sequence of instructions that is repeated until or while a particular condition is satisfied.
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An edge that begins and ends on the same vertex.
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A path that starts and ends at the same point.
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A bus or rail route, walking route, etc. that starts and ends at the same point.
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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.
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A quasigroup with an identity element.
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A loop-shaped intrauterine device.
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An aerobatic maneuver in which an aircraft flies a circular path in a vertical plane.
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A small, narrow opening; a loophole.
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A flexible region in a protein's secondary structure.