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.