retractablepropeller
nounUK /rɪˈtræktəbl prəˈpelə/
US /rɪˈtræktəbl prəˈpelər/
A propeller that can fold or pull in when it is not being used.
The boat's retractablepropeller folds up so it can glide through shallow water.
OTHER MEANINGS
2. A propeller on a drone that folds away for easy carrying.
The drone's retractablepropeller tucks in when it lands.
3. A propeller that slides back into the hull of a boat to reduce drag.
With its retractablepropeller, the sailboat moves faster under sail.
4. A propeller that can be pulled inside an aircraft body during flight.
The retractablepropeller on the glider hides away to cut wind resistance.