dropper

from The American Heritage® Dictionary of the English Language, 5th Edition.

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

from The Century Dictionary.

• noun One who or that which drops.
• noun 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.
• noun 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.
• noun A dog which is a cross between a pointer and a setter.
• noun An artificial fly ad-justed to a leader above the stretcher-fly, used in angling. Also called bobber and drop-fly. See whip.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Fishing) One who, or that which, drops.
• noun 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.
• noun (Mining) A branch vein which drops off from, or leaves, the main lode.
• noun (Zoöl.) A dog which suddenly drops upon the ground when it sights game, -- formerly a common, and still an occasional, habit of the setter.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A utensil for dispensing a single drop of liquid at a time.
• noun One who drops something, especially one who drops a specific item to cause mischief.
• noun computing A software component designed to install malware on a target system.
• noun fishing A fly that drops from the leaden above the bob or end fly.
• noun mining A branch vein which drops off from, or leaves, the main lode.
• noun A dog which suddenly drops upon the ground when it sights game.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun 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