dropper

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. One that drops, especially a small tube with a suction bulb at one end for drawing in a liquid and releasing it in drops.

Century Dictionary and Cyclopedia

1. n. One who or that which drops. Specifically— A glass tube with an elastic cap at one end and a small orifice at the other, for drawing in a liquid and expelling it in drops; a pipette. Also dropping-tube.
2. n. Among florists, a descending shoot produced by seedling bulbs of tulips, instead of a renewal of the bulb upon the radical plate, as in the later method of reproduction.
3. n. In mining, a branch or spur connecting with the main lode: nearly the same as feeder, ex-cept that the latter more generally carries the idea of an enrichment of the lode with which it unites.
4. n. A dog which is a cross between a pointer and a setter.
5. n. An artificial fly ad-justed to a leader above the stretcher-fly, used in angling. Also called bobber and drop-fly. See whip.

Wiktionary

1. n. A utensil for dispensing a single drop of liquid at a time.
2. n. One who drops something, especially one who drops a specific item to cause mischief.
3. n. A software component designed to install malware on a target system.

GNU Webster's 1913

1. n. One who, or that which, drops. A fly that drops from the leader above the bob or end fly.
2. n. A dropping tube, usually of glass or plastic with a narrow opening at the tip and a rubber bulb at the top which can be squeezed to control intake or outflow of the fluid. The word is used in combinations with obvious significance, as eye dropper, medicine dropper, etc.
3. n. A branch vein which drops off from, or leaves, the main lode.
4. n. A dog which suddenly drops upon the ground when it sights game, -- formerly a common, and still an occasional, habit of the setter.

WordNet 3.0

1. n. pipet consisting of a small tube with a vacuum bulb at one end for drawing liquid in and releasing it a drop at a time