transcription, транскрипция: [ ˈsər-vō-ˌmō-tər ]
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)