Examples from the Web for dropper
Fat party appealed to Mr. Dropper's magnanimity to hear his explanation, which Mr. Dropper consented to do.The History and Records of the Elephant Club|Knight Russ Ockside and Q. K. Philander Doesticks
He was using a tail fly and dropper, a red hackle for the former, and an imitation of the common blue house-fly for the dropper.
The first reaping machine using the sickle and guard device was known as the "dropper."Rural Life and the Rural School|Joseph Kennedy
Second dropper, twenty-four inches above first dropper—depending somewhat on the length of the leader.
The dropper is held by its handle while its contents are heated before use.
British Dictionary definitions for dropper
Word Origin and History for dropper
1700, "distiller," agent noun from drop (v.). Meaning "small tube from which liquid may be made to fall in drops" is from 1889.