servo

[sur-voh]
adjective
1.
acting as part of a servomechanism: servo amplifier.
2.
pertaining to or having to do with servomechanisms: servo engineer.
3.
noting the action of certain mechanisms, as brakes, that are set in operation by other mechanisms but which themselves augment the force of that action by the way in which they operate.
noun, plural servos.
4.
Informal. servomechanism.
verb (used with object), servoed, servoing.
5.
to connect (a mechanism) to another as a servomechanism.

Origin:
1945–50; independent use of servo-, taken as an adj., or shortening of words formed with it

Dictionary.com Unabridged

servo-

a combining form used in the names of devices or operations that employ a servomechanism: servocontrol.

Origin:
extracted from servomotor

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
servo1 (ˈsɜːvəʊ)
 
adj
1.  (prenominal) of, relating to, forming part of, or activated by a servomechanism: servo brakes
 
n , -vos
2.  informal short for servomechanism
 
[see servomotor]

servo2 (ˈsɜːvəʊ)
 
n , pl -vos
informal (Austral) a service station

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

servo
1910, from servo-motor (1889), from Fr. servo-moteur (1873), ult. from L. servus "slave" (see serve) + motor "mover" (see motor).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Abbreviations & Acronyms
servo
  1. servomechanism

  2. servomotor

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
When a sensor got a positive signal, a variable flipped, enabling that control routine of the servo.
Unlike a hydraulic servo, the electric booster doesn't use engine power, resulting in slightly better fuel economy.
The right lateral main rotor hydraulic servo and the flared housing attachment lug were consumed in the postimpact fire.
He speculated with doctors about how servo mechanisms might be used to link the brain to an artificial limb.
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