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Cygnus X-1

Cygnus X-1 proper noun: the first generally accepted and confirmed black hole. A black hole in a high-mass X-ray binary (HMXB) with a blue supergiant companion (HD 226868), located in the constellation Cygnus.

Proper noun

Cygnus X-1

  1. The first generally accepted and confirmed black hole. A black hole in a high-mass X-ray binary (HMXB) with a blue supergiant companion (HD 226868), located in the constellation Cygnus.
    Synonyms:
    Cyg X-1
  2. The high-mass X-ray binary star system containing this black hole and blue supergiant star.

Synonyms of Cygnus X-1

  • Cyg X-1

Origin of Cygnus X-1

From Cygnus + X + 1. From being the first discovered discrete astronomical X-ray source (an X-ray star) located in the constellation of Cygnus.

Words formed from Cygnus X-1

  • Cyg X-1

Questions about Cygnus X-1

What does Cygnus X-1 mean?
Cygnus X-1 means the first generally accepted and confirmed black hole. A black hole in a high-mass X-ray binary (HMXB) with a blue supergiant companion (HD 226868), located in the constellation Cygnus.
What part of speech is Cygnus X-1?
Cygnus X-1 is a proper noun.

Words near Cygnus X-1 in the dictionary

  1. cygnicide
  2. Cygnid
  3. Cygnids
  4. cygnine
  5. Cygnus
  6. Cygnus X-1
  7. Cygwin
  8. cyhalothrin
  9. cyheptamide
  10. cyhexatin
  11. CyI

Source and license

Adapted from Wiktionary: Cygnus X-1 (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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