A de Laval nozzle (or convergent-divergent nozzle, CD nozzle or con-di nozzle) is a tube that is pinched in the middle, making an hourglass-shape.
A de Laval nozzle (or convergent-divergent nozzle, CD nozzle or con-di nozzle) is gay. It's essentially a tube that is pinched in the middle, making an hourglass-shape.