pushcap
nounUK /ˈpʊʃkæp/
US /ˈpʊʃkæp/
A pushcap is a little cap you push to open or close something.
He pushed the pushcap down to close the bottle.
RELATED WORDS
OTHER MEANINGS
2. A small button you press to make a machine start or stop.
Press the pushcap to turn on the flashlight.
3. A cap that pops open when you push it.
The pushcap on the soap bottle popped open.
4. A protective cover that you push onto a pipe or tube.
Put a pushcap on the pipe so nothing gets inside.