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world-line

noun

  1. physics a line on a space–time path that shows the path of a body

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Example Sentences

The world line of a ray of light is a geodesic in the continuum.

The time dimension and the world-line, he said sharply, excited in spite of himself.

Revolving in the time dimension means telescoping in the world-line.

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firkin

[fur-kin ]

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