stopcock
- n faucet consisting of a rotating device for regulating flow of a liquid
- The card tells how to turn the stopcock of the tank, which releases the oxygen gradually as needed.
- He had to devise a special stopcock-sealing grease that boron trifluoride would not attack, a system of magnetically controlled rods for stirring his mixtures in closed vessels.
- But, often as not, her dramatic moments flare into melodramatic anticlimax: Missie, weary of a wasted life, staggers to her old home, turns on the gas stopcock, falls asleep.