EXTRAGALACTIC NEBULA

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 Dictionary entry overview: What does extragalactic nebula mean? 

• EXTRAGALACTIC NEBULA (noun)
  The noun EXTRAGALACTIC NEBULA has 1 sense:

1. (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust

  Familiarity information: EXTRAGALACTIC NEBULA used as a noun is very rare.

 Dictionary entry details 

• EXTRAGALACTIC NEBULA (noun)

Sense 1

Meaning:

(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust

Classified under:

Nouns denoting groupings of people or objects

Synonyms:

extragalactic nebula; galaxy

Context example:

'extragalactic nebula' is a former name for 'galaxy'

Hypernyms ("extragalactic nebula" is a kind of...):

accumulation; aggregation; assemblage; collection (several things grouped together or considered as a whole)

Meronyms (members of "extragalactic nebula"):

star ((astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior)

Meronyms (substance of "extragalactic nebula"):

cosmic dust (clouds of particles or gases occurring throughout interstellar space)

Domain category:

astronomy; uranology (the branch of physics that studies celestial bodies and the universe as a whole)

Hyponyms (each of the following is a kind of "extragalactic nebula"):

spiral galaxy; spiral nebula (a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center)

Great Attractor (a massive grouping of galaxies in the direction of Centaurus and Hydra whose gravitational attraction is believed to cause deviations in the paths of other galaxies)

Milky Way; Milky Way Galaxy; Milky Way System (the galaxy containing the solar system; consists of millions of stars that can be seen as a diffuse band of light stretching across the night sky)

Instance hyponyms:

Magellanic Cloud (either of two small galaxies orbiting the Milky Way; visible near the south celestial pole)

Holonyms ("extragalactic nebula" is a member of...):

cosmos; creation; existence; macrocosm; universe; world (everything that exists anywhere)