spiral arm

  1. any of the elongated and curved spiral sections that are connected to the center of a spiral galaxy.

Origin of spiral arm

First recorded in 1910–15

Words Nearby spiral arm

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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 Tabakow
  • Xanabar lays across the spiral arm, a sprawling sphere of influence vast, mighty, solid at the core.

    History Repeats | George Oliver Smith