The transmission of heat in a fluid by the circulation of currents.
The vertical movement of heat and moisture, especially by updrafts and downdrafts in an unstable air mass. The terms convection and thunderstorm are often used interchangeably, although thunderstorms are only one form of convection. Towering cumulus clouds are visible forms of convection.
A shutter, as for a channel for molten metal.
The sliding thread holder in a sewing machine, which carries the lower thread through a loop of the upper thread, to make a lock stitch.
A transport service (such as a bus or train) that goes back and forth between two or more places.
A tool used to carry the woof back and forth between the warp threads on a loom.
Any other item that moves repeatedly back and forth between two positions, possibly transporting something else with it between those points (such as, in chemistry, a molecular shuttle).
A shuttlecock.
Such a transport vehicle; a shuttle bus; a space shuttle.
To transport by shuttle or by means of a shuttle service.
To go back and forth between two places.