Regulator

Reg´u`la`tor Pronunciation: ~l?`t?r

n.	1.	One who, or that which, regulates.
	2.	(Mach.) A contrivance for regulating and controlling motion
	3.	A clock, or other timepiece, used as a standard of correct time. See Astronomical clock (a), under Clock.
	4.	A member of a volunteer committee which, in default of the lawful authority, undertakes to preserve order and prevent crimes; also, sometimes, one of a band organized for the comission of violent crimes. A few stood neutral, or declared in favor of the Regulators. - Bancroft.

Noun	1.	regulator - any of various controls or devices for regulating or controlling fluid flow, pressure, temperature, etc.
	2.	regulator - a official responsible for control and supervision of a particular activity or area of public interest
	3.	regulator - a control that maintains a steady speed in a machine (as by controlling the supply of fuel) Synonyms: governor