regulator

[reg-yuh-ley-ter]

reg·u·la·tor

[reg-yuh-ley-ter]
noun
1.
a person or thing that regulates.
2.
Horology.
a.
an adjustable device in a clock or a watch for making it go faster or slower.
b.
a master clock, usually of great accuracy, against which other clocks are checked.
3.
Machinery.
a.
a governor mechanism for regulating the flow of fuel, steam, etc., to an engine in order to maintain constant speed under varying load or resistance.
b.
a valve for regulating the pressure of flowing gas or liquid to maintain a predetermined pressure.
c.
any of various mechanisms for maintaining a temperature, a level of liquid in a tank, etc.
4.
Electricity. a device for maintaining a designated characteristic, as voltage or current, at a predetermined value, or for varying it according to a predetermined plan.
5.
a device on scuba equipment for regulating the rate at which compressed air is fed through a breathing tube in proportion to the depth of water.
EXPAND
6.
a device for maintaining a constant gas pressure.
7.
(initial capital letter) American History.
a.
a member of any of several bands or committees in North Carolina (1767–71), formed to resist certain abuses, as extortion by officials.
b.
(in newly settled areas) a member of any band or committee organized to preserve order before the establishment of regular legal authority.
COLLAPSE

Origin:
1645–55; regulate + -or2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Regulator is always a great word to know.
So is quincunx. Does it mean:
a chattering or flighty, light-headed person.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
Collins
World English Dictionary
regulator (ˈrɛɡjʊˌleɪtə)
 
n
1.  a person or thing that regulates
2.  the mechanism, including the hairspring and the balance wheel, by which the speed of a timepiece is regulated
3.  a timepiece, known to be accurate, by which others are timed and regulated
4.  any of various mechanisms or devices, such as a governor valve, for controlling fluid flow, pressure, temperature, voltage, etc
5.  Also called: regulator gene a gene the product of which controls the synthesis of a product from another gene

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