- a combining form meaning “ring,” “circle,” “spiral,” used in the formation of compound words: gyromagnetic; gyroscope.
Also especially before a vowel, gyr-.
Origin of gyro-
< Greek gŷros ring, noun use of gȳrós round
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
before a vowel gyr-
- indicating rotating or gyrating motiongyroscope
- indicating a spiral
- indicating a gyroscopegyrocompass
via Latin from Greek guro-, from guros circle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for gyro-
word-forming element meaning "gyrating" or "gyroscope," from comb. form of Greek gyros "ring, circle" (see gyre).
Online Etymology Dictionary, © 2010 Douglas Harper