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We found 2 dictionaries with English definitions that include the word niven ring:
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General (2 matching dictionaries)

1. Niven ring: Wiktionary [home, info]
2. Niven ring: Wikipedia, the Free Encyclopedia [home, info]

Quick definitions from Wiktionary (Niven ring) ▸ noun:  (science fiction) A solid ring type Dyson ring around a star, capable of containing an interior surface that could be terraformed into a habitat with an inner ring of occultation panels to provide a day-night cycle. ▸ Words similar to niven ring ▸ Usage examples for niven ring ▸ Idioms related to niven ring (New!) ▸ Words that often appear near niven ring ▸ Rhymes of niven ring ▸ Invented words related to niven ring