Definify.com
Webster 1913 Edition
dropper
drop′per
,Noun.
1.
One who, or that which, drops.
Specif.:
(Fishing)
A fly that drops from the leader above the bob or end fly.
3.
(Mining)
A branch vein which drops off from, or leaves, the main lode.
4.
(Zool.)
A dog which suddenly drops upon the ground when it sights game, – formerly a common, and still an occasional, habit of the setter.