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"We'd have most of what we predicted of the conquest of space, if we hadn't ignored parasite control."
- Larry Niven

Arteria Portal  
  A wormhole entrance.  

Being on the outermost reaches of the galaxy ... did not necessarily mean that a place was inaccessible, providing it was close to an arteria portal.

Arteria - wormholes - and the portals which were their exits and entrances meant everything in the galactic community; they represented the difference between having to crawl everywhere at less than the speed of light and making almost instantaneous transitions from one stellar system to another...

The only way to get an arteria portal from one place to another was to put it in a spaceship and physically take it, slower than light, from one place to another, leaving the other end - usually - anchored where you'd started out.

From The Algebraist, by Iain M Banks.
Published by Orbit in 2004
Additional resources -

Simmons fans will think of the farcaster from Hyperion [1989].

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Additional resources:
  More Ideas and Technology from The Algebraist
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