n.
Pronunciation: ' s ə r-v ō - ˌ m ō -t ə r
Function: noun
Etymology: French servo-moteur, from Latin servus slave, servant + French -o- + moteur motor, from Latin motor one that moves ― more at MOTOR
Date: 1889
: a power-driven mechanism that supplements a primary control operated by a comparatively feeble force (as in a servomechanism)