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Definition of Spiral nebula
1. Noun. A galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center.
Exact synonyms: Spiral Galaxy
Generic synonyms: Extragalactic Nebula, Galaxy
Specialized synonyms: Andromeda Galaxy
Generic synonyms: Extragalactic Nebula, Galaxy
Specialized synonyms: Andromeda Galaxy
Definition of Spiral nebula
1. Noun. (astronomy) a spiral-shaped nebula ¹
2. Noun. (astronomy obsolete) a spiral-shaped white nebula; these were generally determined to be spiral galaxies in the 20th century ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Spiral Nebula
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