| Main Entry: | spiral galaxy |
| Part of Speech: | noun |
| Definition: | a galaxy in spiral structure |
Synonyms: |
barred spiral galaxy, spiral, spiral nebula |
| Main Entry: | galaxy |
| Part of Speech: | noun |
| Definition: | nebula |
Synonyms: |
Milky Way, elliptical galaxy, irregular galaxy, island universe, spiral galaxy, star cluster, star system |