spiral nebula en · NOUN
Meanings
- a spiral-shaped nebula
- (obsolete) a spiral-shaped white nebula; these were generally determined to be spiral galaxies in the 20th century
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| spiral nebulae | Number=Plur | lexicographic | |
| spiral nebulas | Number=Plur | lexicographic |