servomotor

noun ser·vo·mo·tor \ˈsər-vō-ˌmō-tər\

Definition of SERVOMOTOR

: a power-driven mechanism that supplements a primary control operated by a comparatively feeble force (as in a servomechanism)

French servo-moteur, from Latin servus slave, servant + French -o- + moteur motor, from Latin motor one that moves — more at motor

First Known Use: 1889

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