An Etymological Dictionary of Astronomy and Astrophysics

A combining form meaning “ring, circle, spiral,” used in the formation of compound words: → gyroscope, → gyrofrequency, → gyroradius, → gyrate.

Etymology (EN): From Gk. gyros “circle, ring;” PIE base *geu- “to bend, curve.”

Etymology (PE): From leridan, → gyrate.