gyro

1 [jahy-roh]
noun, plural gyros.

Origin:
1905–10; independent use of gyro-

Dictionary.com Unabridged

gyro

2 [jeer-oh, zheer-oh; Greek yee-raw]
noun Greek Cookery.
meat, usually lamb, roasted on a vertical spit, then thinly sliced, topped with onions, and usually served in a sandwich of pita bread.

Origin:
1970–75; < Modern Greek gŷros literally, turn, revolution; see gyre

gyro-

a combining form meaning “ring,” “circle,” “spiral,” used in the formation of compound words: gyromagnetic; gyroscope.
Also, especially before a vowel, gyr-.


Origin:
< Greek gŷros ring, noun use of gȳrós round

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
gyro (ˈdʒaɪrəʊ)
 
n , pl -ros
1.  See gyrocompass
2.  See gyroscope

gyro- or (before a vowel) gyr-
 
combining form
1.  indicating rotating or gyrating motion: gyroscope
2.  indicating a spiral
3.  indicating a gyroscope: gyrocompass
 
[via Latin from Greek guro-, from guros circle]
 
gyr- or (before a vowel) gyr-
 
combining form
 
[via Latin from Greek guro-, from guros circle]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

gyro
sandwich made from roasted lamb, late 20c., originally the meat itself, as roasted on a rotating spit, from Modern Gk. gyros "a circle," mistaken in Eng. for a plural and shorn of its -s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Abbreviations & Acronyms
gyro
  1. gyrocompass

  2. gyroscope

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
They'll also have to turn on the last remaining gyro to make sure it will stay
  pointed correctly.
Move on to an entrée of a mushroom gyro, free range lamp chops or seafood kabob.
The restaurant's lunch menu is noted for its gyro sandwiches and pita wraps,
  and also features burgers and sandwiches.
The restaurant's menu highlights include a house-made gyro platter and
  pan-seared sea scallops served over spinach.
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