spiral galaxy

noun
|Updated on: 10 Jun 2018

Definition of spiral galaxy

: a galaxy exhibiting a central nucleus or barred structure from which extend curved arms of higher luminosity called also spiral nebula

Recent Examples of spiral galaxy from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'spiral galaxy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of spiral galaxy

1913

in the meaning defined above

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