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(astronomy) That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon.
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(geometry) A continuous part of the circumference of a circle (circular arc) or of another curve.
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A curve, in general.
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A band contained within parallel curves, or something of that shape.
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(electrics) A flow of current across an insulating medium; especially a hot, luminous discharge between either two electrodes or as lightning.
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(narratology) A story arc.
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(mathematics) A continuous mapping from a real interval (typically [0, 1]) into a space.
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(graph theory) A directed edge.
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(basketball, slang) The three-point line.
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(film) An arclight.