dropper

noun

• 1a short glass tube with a rubber bulb at one end and a tiny hole at the other, for measuring out drops of medicine or other liquids: oils sold in bottles with a rubber-tipped dropper an eye dropper

• 2Australian/NZ & South African a light vertical stave in a fence, especially a lath used to separate the wires of a wire fence.

• 3 Fishing a subsidiary line or loop of filament attached to a main line or leader: [as modifier]:a dropper line