stopcock
NounWordNet 3.0
Webster's Dictionary (GCIDE)
Stopcock \Stop"cock`\, n.
1.A bib, faucet, or short pipe, fitted with a turning stopper or plug for permitting or restraining the flow of a liquid or gas; a cock or valve for checking or regulating the flow of water, gas, etc., through or from a pipe, etc. [1913 Webster]
2.The turning plug, stopper, or spigot of a faucet. [R.] [1913 Webster]