spiral arm
nounAstronomy.
any of the elongated and curved spiral sections that are connected to the center of a spiral galaxy.
Origin of spiral arm
1First recorded in 1910–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use spiral arm in a sentence
Tantalus lay far out on a spiral arm, well away from the main stream of traffic that flowed through the galaxy.
Faithfully Yours | Lou TabakowXanabar lays across the spiral arm, a sprawling sphere of influence vast, mighty, solid at the core.
History Repeats | George Oliver Smith
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