Roman ring

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English[edit]

Etymology[edit]

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium. Particularly: “why Roman?”)

Noun[edit]

Roman ring (plural Roman rings)

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Wikipedia
  1. A configuration of wormholes where for each individual wormhole the time difference across its mouths is such that it may not allow a closed timelike curve.
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