- regulator - any of various controls or devices for regulating or controlling fluid flow, pressure, temperature, etc.
--1 is a kind of control, controller
--1 has particulars:Derived form: verb regulate1 - regulator - a official responsible for control and supervision of a particular activity or area of public interest
--2 is a kind of official, functionary
Derived form: verb regulate2 - governor, regulator - a control that maintains a steady speed in a machine (as by controlling the supply of fuel)
--3 is a kind of control, controller
--3 has particulars: timer