STOPCOCK
Meaning of STOPCOCK in English
stop ‧ cock /ˈstɒpkɒk $ ˈstɑːpkɑːk/ BrE AmE noun [countable]
a ↑ tap that controls the flow of a liquid or gas through a pipe
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012