Is “Stopcock” a Scrabble word?
Yes
STOPCOCK
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Stopcock
/ˈstɒpkɒk/
noun
1.A valve, tap or faucet which regulates the flow of liquid or gas through a pipe.
2.A main shutoff for water to a home from a municipal supply. Usually these valves exist in pairs, one outside the property boundary and one inside the property boundary.
“If you have a burst pipe turn the water off at the stopcock.”