Hyperparallel
Two lines in hyperbolic geometry which diverge from each other in both directions.
See also
Antiparallel, Ideal Point, ParallelExplore with Wolfram|Alpha
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Cite this as:
Weisstein, Eric W. "Hyperparallel." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Hyperparallel.html