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gyro-

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  1. a combining form meaning “ring,” “circle,” “spiral,” used in the formation of compound words: gyromagnetic; gyroscope.
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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
British Dictionary definitions for gyro-

gyro-

before a vowel gyr-

combining form
  1. indicating rotating or gyrating motiongyroscope
  2. indicating a spiral
  3. indicating a gyroscopegyrocompass
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Word Origin

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).

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Online Etymology Dictionary, © 2010 Douglas Harper