dropper

noun

1. A utensil for dispensing a single drop of liquid at a time.
2. One who drops something, especially one who drops a specific item to cause mischief.
3. A software component designed to install malware on a target system.
4. A fly that drops from the leaden above the bob or end fly.
5. A branch vein which drops off from, or leaves, the main lode.
6. The young bulb of a tulip, not of flowering size.
7. A dog which suddenly drops upon the ground when it sights game.
8. A batten fixed to a post-and-wire fence to keep the wires apart.
9. A person who uses fraudulent cheques.
10. A drop shot.
11. A delivery by lob bowling (no longer legal).
12. A bowler who makes such deliveries.
13. A seat post whose height can be adjusted while riding.