This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A servomechanism.

n. A servomotor.

n. A servomechanism or servomotor.

n. A service station, being a place to buy petrol for cars etc., as well as various convenience items, with or without actual car service facilities.

n. control system that converts a small mechanical motion into one requiring much greater power; may include a negative feedback system

adj. of or involving servomechanisms

"Ah well, the walk back netted me some water and a pie from the servo, which is essential at that part of the night."

control system   

baseband    analog    hydraulic    microprocessor    stepper    actuators    programmable    encoder    hysteresis    phase-locked