- noun a valve formed of a tapered needle projecting into a small opening in a tube, etc., usually connected to a float, which provides fine adjustment of fluid flow
Cars & Driving
- noun a valve with a needle-shaped pin that can be moved to control the flow of a fluid
- noun in a carburettor, a valve which controls the amount of petrol flowing from the pump to the float chamber
- A type of globe valve in which a long pin or needle, tapered at the end, moves in and out of a conical seat to regulate the flow of liquid.