Worcester Valve

worcester
United States lexicographer who was accused of plagiarism by Noah Webster (1784-1865)
an industrial and university city in central Massachusetts to the west of Boston
An industrial and college city in central Massachusetts, on the Blackstone River; pop. 172,648
a cathedral city in west central England on the River Severn

valve
control consisting of a mechanical device for controlling the flow of a fluid
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only