sillcock; hose cock
A water faucet installed on an exterior wall, used for connecting a garden hose. Common in gardening and outdoor cleaning contexts.
I connect a hose to the sillcock in the garden and water the plants.
In winter, I drain the sillcock to prevent it from freezing.
Compound of 散水 (sprinkling water) and 栓 (plug, faucet). The exact historical derivation is uncertain, but the term is a straightforward modern technical compound.