Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun astronomy a spiral-shaped nebula
  • noun astronomy, obsolete a spiral-shaped white nebula; these were generally determined to be spiral galaxies in the 20th century

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

spiral + nebula

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