nozzle

Sometimes a jet nozzle at the tip of the bit sprays drilling fluid to help with drilling progress.

This is reinforcement made of basalt, remelted volcanic rock forced through tiny nozzles to create fibers that are extremely strong.

I went to the gas station to fill up my car and, like, dust came out of the nozzle.

I really respect people that design fountains like this, because it has to do with flow rate, has to do with, pressure, the nozzle geometry.