ring gate

noun

, Metallurgy.

1. a gate having a widened opening containing a centered disk to prevent molten metal from falling in a direct vertical stream.

Example Sentences

The first three seasons of the show tell a relatively contained story: tensions between Earth, Mars, and the Belters bring the solar system to war, and the alien protomolecule upends that when it creates a massive ring gate that connects the solar system to a vast, interstellar network.

From The Verge

That book followed Captain James Holden and the crew of the Rocinante as they accompanied an expedition made up of various spaceships from around the solar system to investigate the ring gate that was constructed by an alien substance called the protomolecule throughout the show’s second and third seasons.

From The Verge

The books will also begin to explore the nature of the thousands of worlds beyond the ring gate, the mysterious creators who built them, and have begun to explore their downfall.

From The Verge

"It's something like the 'Bar Sinister' victory after all!" she exclaimed joyously as she rejoined the delighted Master at the ring gate.

From Project Gutenberg

Wide stood the black low'ring gate; and deep was the silence within.

From Project Gutenberg